CONFERENCE REPORT
HOW A MODERN TRAMWAY SYSTEM
MIGHT SOLVE BATH’S
TRAFFIC PROBLEMS
Saturday 25 April 1998
at
The Bath Society Meeting Room, Green Park
| Bath’s Traffic Problems | Mike Finch |
| Pollution in a Heritage City | Professor Geoffrey Allen |
| Why Trams ? | Professor Lewis Lesley |
| Financing a Tramway | Jonathan Digby - Rogers |
| Bath Electric Tramways 1904-39 | Colin Maggs |
| The LR55 Rail System | Philip Sutcliffe |
| European Tramways Today | Brian Lomas |
| Modern British Tram Design | Colin Robinson |
| Summing Up | Martin Willey |
To go (back) to the Tramdev site of Brian Lomas
click here
By
MIKE FINCH
Bath and North East Somerset Council
WORLD HERITAGE SITE
Bath is unique because the whole city is a World Heritage Site. The geography comprises a river valley surrounded by hills which precludes the building of a ring-road and directs unwanted traffic into the centre.
TOO MUCH TRAFFIC
Central traffic –– Many residential and business needs might
be met by an alternative to the car.
Traffic from outside –– Has different needs. Park + Ride is
an attempt to take this out of the city centre.
Through traffic –– Does not want to go through the city but
is obliged to do so; North-south from the motorway to Southampton and east-west
to Bristol. This traffic would not directly benefit from a rapid
transit system.
At peak times the radial routes become congested, causing
1) Pollution, affecting buildings, retained by the bowl of hills.
2) Danger to other road users by mixed traffic in city centre.
3) Noise.
4) Visual intrusion.
TABLE I ––– TRAFFIC FLOWS
| London Road | 19,000 Vehicles/Day |
| Lower Bristol Road | 23,000 " " |
| A4 to Bristol | 22,000 " " |
TABLE II ––TRAFFIC TRENDS
| 1987 | 1997 | %ge change | |
| Outer Cordon vehs/day | 119,000 | 123,000 | +13% |
| Inner cordon | 110,000 | 104,000 | -5% |
| National trend | –––– | –––– | +35% |
Probable factors causing inner-city reduction are traffic jams
& parking costs.
ALTERNATIVES TO THE CAR
| Existing | Buses, city and country extensive network privately run.
Park + ride for people from outside. Trains. Walking in city centre only or for leisure. Cycling, hills are a problem. |
| Future | Rapid Transit, to be looked at. Is there a rôle in Bath?
- Which technology? - Would it compete with buses physically and financially? - How would it run through the centre? - There was a study 3 years ago, on linking P+R to the centre. A new study is to look at new technologies and will probably lean towards Kerb Guided Buses. |
DISCUSSION
| What proportion of inner cordon traffic might shift mode? How does power station pollution compare with diesel engine? | Martin Willey |
| Modal switch predictions not known, not in study. Breakdown of information not available. | Mike Finch |
| Speaking as an asthma sufferer, does report take account of pollution, especially buses? | Unidentified |
| Buses are all subjected to M.O.T. test but the test may not represent actual working conditions. Gas or other fuels may be the answer. | Mike Finch |
| In congested areas diesel engines do not work optimally. In Broad Street, open topped buses account for 1.8% of vehicles, the rest pollute too. Alternatives tested include gas, electric, exhaust particulate traps. | Vernon Bettison |
| Particulate traps and sulphur-free diesel? Maintenance is a factor in engine emissions. Power stations emit Carbon Dioxide pollution but away from populations | Barry Maunder |
| Our nearest supplies of sulphur-free diesel are at present in Aberdeen & Paris. | Vernon Bettison |
By
PROFESSOR GEOFF. ALLEN
University of Bristol
Buildings deteriorate through natural wear and tear, vandalism and air pollution.
Burning of coal used to be the prime cause of air pollution in urban
environments, a 1952 photograph shows smog over Bath which is not obvious
nowadays. Comparison of recent photographs of Köln cathedral
with some taken in 1900, shows considerable deterioration of stonework.
A statue in Brompton cemetery shows typical staining and erosion.
The main pollutant was Sulphur Dioxide (SO2), it acts by converting
the Calcium Carbonate (CaCO3) in limestone, marble, Portland Stone and
Bath Stone, into Gypsum (CaSO4) which dissolves in water. Soot remains
on unwashed areas.
The extent of erosion can be measured on a statue of St Andrew at St
Paul’s Cathedral, London, where the uneroded lead plug in a lifting hole,
now stands several centimetres proud of the eroded stone surface.
Bath stonework can be cleaned but soon becomes dirty again. A
photograph of Walcot Terrace shows one building left dirty, another recently
cleaned and a third previously cleaned and now becoming rapidly re- soiled.
Electron probe microanalysis shows that CaCO3 in samples of affected
stonework, is being changed by SO2 into crystals of CaSO4 which, being
physically larger, prise the structure of the stone apart. This is
happening to a depth of 1cm and cannot be reversed by washing.
CHEMICAL POLLUTANTS
As present-day levels of SO2 are less than 10% of 1950s levels, why
hasn’t there been a corresponding reduction in rate of deterioration?
At Bristol University, the rate of reaction is measured as a weight
gain of samples of stone kept in artificial atmospheres with controlled
levels of pollutant gasses. It has been found that SO2 reacts as
expected. Other vehicle exhaust gasses, oxides of Nitrogen (NOx and
NO2) also react in a similar way. When water is present, the reaction
speeds increase; but when water, SO2, and NO2 are all present simultaneously,
the reaction is 10 to 24 times faster, depending on the type of stone.
It is the increase in NO2 from traffic fumes which has more than compensated
for the reduction in SO2.
PARTICULATE POLLUTANTS
PM10s are microscopic airborne particles measuring less than 10 microns,
they can evade the human body’s defences and enter the lungs. Air
samples taken in Bath contain PM10s of various types:
Spherical iron particles –– Originating in Wales, usually harmless.
Hollow silica spheres –– Fuel ash, which can sometimes cause
medical problems by carrying SO 2 into the lungs.
Diesel PM10s –– Spongy, with a large surface area in relation
to their size, the surface adsorbs SO 2, NOx and Hydrocarbons which are
carried into the lungs in relatively large quantities and cause severe
medical problems. On buildings they cause deep chemical damage, give
a sooty appearance and supply a hydrocarbon substrate to algal growth which,
in turn, gives green discolouration.
DISCUSSION
| Are other pollutants visible? | Donald Jepson |
| Oil mist, which can stick to PM10s encouraging algae. | Prof. Allen |
| Are all PM10s diesel particulates? | Andy Spearman |
| No, anything under 10microns is a PM10 but the large surface area of diesel carbon PM10s is what makes them dangerous because they adsorb and transport other chemicals into the lungs | Prof. Allen |
| What proportion of pollutants is due to transport? | Roger Newport |
| Electricity generation by gas is increasing so this would reduce all pollution except Carbon Dioxide. –– Motor vehicle production is also a cause of pollution. | Prof. Allen |
| Are catalytic converters advantageous on short (e.g. urban school) runs? | Unidentified |
| Not until properly hot. | Prof. Allen |
| Aren’t homes biggest source of pollution? | Unidentified |
| Yes | Prof. Allen |
| Can we have power without pollution? | Mike Rowden |
| Gas power is probably best but still produces Carbon Dioxide, so does electricity generation. | Prof. Allen |
By
PROFESSOR LEWIS LESLEY
Liverpool John Moores University.
Advertising has been used to promote a ‘love affair’ with the car.
Proof of this: Photograph of our first car with family behind it; and parked
on a bus stop. Motor industry spends £25 on advertising for
every £1 spent by all the public transport industry put together.
Although car ownership per capita is lower in U.K. than on the Continent,
we have much greater car usage.
TABLE I ––– INCREASE IN U.K. CAR USAGE (%GE OF 1955 TOTAL)
| 1955 | 1997 | |
| Bus | 35% | 18% |
| Train | 25% | 25% |
| Car | 40% | 757% |
| TOTAL | 100% | 800% |
EXAMPLES OF TRAFFIC GROWTH
Newcastle.–– 1948 a dual carriageway was planned, in 1970 it
was built as a double-decked motorway.
Houston (U.S.A.).–– 18 lane highway reduced to 18 m.p.h. in
rush hour.
America.–– Out-of-town shopping centre car park, so large that
it needs a bus service from cars to shops.
In 1963, Buchanan said ‘traffic will always fill the urban roads available’,
recent thinking confirms that restricting roads will actually reduce traffic.
POLLUTION
Road traffic produces more pollution than all industry and power stations
combined. Major pollutants are:
Carbon Monoxide –– Virtually all from road traffic. Tokyo
police have to wear oxygen masks. If roads were factories they would
be closed down by the Health & Safety Executive.
Nitrogen Oxides –– 50% from traffic, much of the rest from power
stations, contributes to acid rain. 200 power stations are easier
to control than 30million vehicles
Aldehydes –– Carcinogens
Benzene & other organic solvents –– Carcinogens with no
safe level of exposure. (W.H.O.)
PM10s –– Carry carcinogens.
Ten thousand deaths per year were previously accepted as due to vehicle
pollution, now this has been revised to 16 to 24 thousand, compare with
4 thousand deaths from road traffic accidents.
Vehicle emissions trigger asthma attacks. Britain has the highest
level of childhood asthma in the world. Merseyside Health Area spends
£120 million per year on asthma medication (excluding lost school
and working time + disruption)
POSSIBLE SOLUTIONS
More walking __
Journeys walked at present (nationally):
< 1 mile ~ 80% 1
– 2 miles ~ 42% 2 – 3 miles
~ 22%.
Unpleasant in towns due to noise, fumes and danger, (1200 pedestrian
fatalities).
1994 – Royal Commission Report on Environmental Pollution “Traffic
emissions pose a serious health problem”.
1997 – Extraordinary supplementary report, “drastic action is needed”.
Proposed solutions: Higher petrol taxes, Road Traffic Reduction
Act 1997, better public transport.
Innovative vehicles –– Electric cars, in 1898 held world land
speed record but await improvement. If fuel cell problem could be
cracked it would stop pollution but not congestion. Californian study
suggests complete conversion to electric transport would increase load
on power stations by only 5%. Vehicles also pollute during manufacture
and disposal.
Public Transport –– Requirements: Image, travel
information, passenger reassurance, security, service. Present systems
fail on all counts, a long way behind cars.
Bus deregulation (1986) ___ A decline in bus use of 1.5% per
year became 2.1%, new bus purchases fell from 5000 pa to 2500 pa.
Although bus operators have worked hard to compensate, they are now facing
deep trouble. Car use must no longer be encouraged, buses should
market their image better, selling destinations rather than journeys (this
works well for airlines).
An integrated transport system should involve geographical interchange,
through-ticketing and linked timetabling. All modes of public transport
will benefit.
Light Rail –– Usually includes the following features:-
COSTS
35% Track and structures 30% Vehicles 10% Electrification
SUMMARY
We have to do something about traffic pollution and
congestion. Public transport is the solution but present methods
are shown by consumer behaviour to be unacceptable.
Light rail (tramways) are a proven solution and
financing is now becoming feasible for towns and cities the size of Bath.
DISCUSSION
| When will through-ticketing be introduced by Badgerline? | Andrew Furse
Hyder consulting |
| Two months ago! | Vernon Bettison |
| The idea does not seem to be widely marketed | Martin Willey |
| Through ticketing is expanding rapidly (examples given) | Vernon Bettison |
| Tickets are available at a booking office but not on the bus | Martin Willey |
| In Oxford they now are | Prof. Lesley |
| We are held back by archaic railway booking system | Vernon Bettison |
| (Show of hands?) –– Fewer than 10% know of through ticketing | Martin Willey |
| Bus future is good but a few poor examples detract from the good ones. Where is the space to put tramways in Bath? | Vernon Bettison |
| Integration is the key, not replacement of successful bus services. First group already owns bus, train and tramway. | Martin Willey |
| Integration should be the aim with ‘horses for courses’. Social exclusion in transport should be avoided. | David Redgewell
Transport 2000 |
| How do we persuade the 85% who never use bus that it is an acceptable form of transport? Bus has a marketing problem. | Prof. Lesley |
| Why not trolleybus? No change to roads, no pollution. | Unidentified |
| The image doesn’t ‘sell’ transport | Prof. Lesley |
| Can new Southgate be exploited as an integrated transport interchange? | Rae Harris |
| All French systems use integration and it is very successful. Continental advert for Mercedes car shows driver catching tram, “Man intelligent enough to own a Mercedes is intelligent enough to know when to use it”. Unlimited car use unacceptable now in Germany. | Prof. Lesley |
| What assumptions were used to produce pollution figures? | Unidentified |
| U.K.A.E.A. study shows car to bus transfer will alter SO 2 levels but little else. Los Angeles study shows car to electric transport reduces total pollution. | Prof. Lesley |
| Hills are a problem for cyclists in Bath, can trams carry or integrate with bicycles? | Ian Wood |
| Yes, as in Holland. Either in the tram or by lock-up at tram stops. New TRAMpower vehicle has been tested with cycles. | Prof. Lesley |
“Financing a Tramway”
By
JONATHAN DIGBY-ROGERS
Investment Capital Ltd
Rail and Light Rail projects are much more capital-intensive than bus-based projects so the burden of repayment is greater. Government funding is unlikely, so we look to the Private Sector.
SOURCES OF FINANCE
| 1) | Investors | ~equity |
| 2) | Mezzanine Financiers | ~equity |
| 3) | Banks | ~debt |
2) Mezzanine Financiers –– Intended to fill gaps in funding between banks and investors; they have the same expectations as investors, so can be disregarded.
3) Banks –– Primary source of finance. London has over 500 banks and their job is to lend money but none has any real experience of long-term transport projects.
Although initially enthusiastic, a bank will soon become cold towards a project it doesn’t really understand. The bank must be enthused and supplied with large amounts of information which it would not otherwise have. The bank must be involved at the right time, after major areas of uncertainty have been removed
MINIMISING BANK REPAYMENTS
There is up to 3% variation in interest rates between
banks, so choose your bank wisely. A longer term for pay-back will
ease repayment costs. Calculate your own requirements and present
them to the bank.
Some banks will only finance 40% of a project, others
up to 80%; the higher the bank percentage, the less equity needed to fill
the gap and the easier will be the repayment.
Bank interest rate is calculated from a baseline
which can vary according to the length of fixed interest period agreed;
sometimes a long period is advantageous, sometimes a short period depending
on predicted interest rate trends.
GUARANTEES
Risk can be spread by the bank or the borrower.
New technology risks –– If it fails, can someone agree to foot
the bill?
Contractors risks –– Well understood and can be insured against.
Cash flow risks –– When the project is up and running, cash
flow might turn out to be be inadequate to support repayments. Banks
must be given proper forecasts otherwise they will draw their own pessimistic
conclusions. Core cash flow will determine the amount they are prepared
to loan. It must at least equal interest and repayments but if extra
can be generated it will allow equity funding to be sought, reducing the
required bank debt percentage.
If guarantors can be found for such things as traffic
flow, more debt will be forthcoming.
Usually guarantors will be people involved in the
project such as operator or contractor. This is often regarded as
the price of entry into the project. A landowner who provides the
land could become an equity partner.
From the above, it can be seen that the more capital-
intensive a project is, the harder it has to work to repay debt.
Reducing the initial infrastructure costs ( eg LR55 system) will
greatly ease this problem.
DISCUSSION
| Does the Government address the shortfall in funding? | Martin Willey |
| Cash grants are the most important form of support, guarantees are usually too short-term. | J.Digby-Rogers |
| Does the Eurotunnel fiasco demonstrate failings of the banks? Would banks become shareholders if necessary to save a failing prject? | Arthur Smith |
| Eurotunnel was a gigantic ‘cock-up’, I worked on it! The project was just too big and the banks were forced to give equity. Smaller projects are more predictable and banks may be prepared to offer equity. | J.Digby-Rogers |
| Would Bath’s tourism be seen by a banker as an advantage to viability of a project in a small city like Bath? | Barry Maunder |
| Yes, if this were confirmed by a traffic study. | J.Digby-Rogers |
| What equity arrangements have worked best? | Martin Willey |
| Contractors are usually the most willing source, encouraged recently by the Private Finance Initiative. | J.Digby-Rogers |
| Could the residents of Bath make up the shortfall by becoming shareholders? | Don Lovell |
| Yes, it works for football stadia, every bit helps. | J.Digby-Rogers |
By
COLIN MAGGS
A series of about 20 historic slides was shown, depicting aspects of the previous Bath tramway system. Mr Maggs recounted anecdotes of several amusing incidents which had occurred during its operation. He presented the following factual information:
In 1904 Bath Electric tramways replaced an earlier
horse-drawn system. The tracks eventually covered nearly 15 miles
TABLE I ––– ELECTRIC TRAM SERVICES IN BATH 1904 – 1939
| G.W.R. Station | Kingsmead Square | Weston | |
| " | " | Newbridge | Newton St Loe |
| Guildhall | London Road | Bathford | |
| " | Bear Flat | Combe Down | |
| " | L wr Bristol Rd | Twerton | |
| " | " | (single deck only) | Oldfield Park |
Considerable disruption was caused by road closure
during installation. The fleet consisted of 36 double decked cars,
6 single decked and one water car with snow broom. The depôt
and power station were in Walcot Street.
In addition to passengers, the tramways carried
parcels (hot food delivery), milk, perishables, post to outlying villages
and bodies to the mortuary. Profitable sidelines included a combined
tram / theatre ticket, hire of staff for functions, messenger boys, a tea
garden and a travel agency offering through- ticketing to Australia!
By
PHILIP SUTCLIFFE
LR55 Project Manager
Although there had been a clearly identified need for a shallow section track for use in tramways, it was not until eight years ago that the complete concept proposed by Professor Lewis Lesley was shown to Philip Sutcliffe at Edgar Allen Engineering Ltd. It appeared to answer many of the problems being experienced at that time.
THE LR55 SYSTEM
This comprises a rolled steel rail bonded by Polymer
into a concrete trough. The novel aspects of the system, which particularly
appealed from the outset, included reduced traffic disruption when installing,
reduced height which decreased noise and the Polymer encasement which reduces
maintenance requirements. Although intended as street-running track,
it also has advantages where headroom is restricted.
THE LR55 GROUP
Tarmac Precast Concrete Co . . . . . . . Precast concrete trough
Edgar Allen Engineering Ltd . . . . . . . Switches and crossings
Symonds Travers Morgan . . . . . . . . . Design consultants
A.L.H. Systems (Westbury Wilts.) . . .Polymer grout
Vost Alpine . . . . . . . . . . . . . . . . . . . . Rolled rail sections
Because the initial cost of specially made rolling-mill
rolls is very high we have not yet manufactured rolled lengths of rail.
Instead, Edgar Allen Co has cast our rail sections for the present trials,
in Grade 90 Rail Quality Steel.
INSTALLATION
With vehicles up to 80 tons, the load is so well
spread that the usual preliminary diversion of Statutory Undertakings (i.e.
sewers, water, gas electricity services) is not necessary in this case.
The proposal is to mechanise laying; a narrow channel being cut into the
road surface with a laser-guided diamond gang-saw. Only one half
of the road is opened at a time, each track of a twin-track street being
laid separately. Concrete trough units are laid to line and level
on a 25mm bed of asphaltic sand but they only need to be tied with gauge
rods on curves of less than 50m radius.
The rails, which would be pre-curved and tested
before delivery, are sand- blasted on site to improve adhesion of the polymer.
Rails are lowered into position, bonded together and the polymer injected
to hold them in place. A skid-resistant surface can be applied to
the polymer at this stage. Any disturbed road surface is reinstated.
ADVANTAGES
Deduced from preliminary trials, LR55 has the following
advantages over current tramway practice:
A track which withstands the passage of rail vehicles
may nevertheless be torn out by the continuous transverse passage of heavy
road vehicles. To test this, a track section was laid across the
entrance/exit of Rotherham Bus Garage, receiving the equivalent of 30 years’
life in 21/2 years. After this time, during which no adverse effects
were encountered, a building was
constructed over the rail without notice, precluding subsequent recovery
for examination.
South Yorkshire Passenger Transport
Executive then authorised a further section to be laid at the Alsing Road
crossing of the Sheffield Supertram track. Here it is subjected to
heavy transverse road vehicle wear near a Heavy Goods Vehicle service area;
and double the normal amount of tramway wear because it is at a point where
double track becomes single on the approach to the Meadowhall interchange.
This demonstrated considerable confidence on the part of the tramway authority,
as any failure in this critical section would cause major disruption.
Using the above-proposed laying techniques, no problems were encountered.
Fortnightly inspection for the first six months showed the track to be
performing well, the inspection period has been relaxed to three- monthly.
After two years, the skid resistance is still good and nothing has needed
replacement.
DISCUSSION
| Could you tell us more about the steel? | Martin Willey |
| So far we have cast in Grade 90A steel, which is standard for most heavily used railways at present. On curves we may opt for something harder and for switches and crossings, ‘work hardening’ manganese steel or similar alternatives, otherwise occasional replacement would cause considerable disruption | Philip Sutcliffe |
| Do cars have difficulty with tram rails? | Unidentified |
| Places with established tramways, Calgary, Toronto, Boston, report no problems despite poor weather. Only complaints.received from places where trams recently installed. Complaints in Sheffield often exaggerated or tramway blamed for accidents from other causes. I have experimented and had no problem when driving sensibly. There is more of a problem for cycles and motor-cycles. | Philip Sutcliffe |
| Having lived in Germany, no problems once the rules are understood. Trams have priority. | Unidentified |
| What are the advantages of rail over pneumatic tyre? | Unidentified |
| Better guidance, less maintenance. | Philip Sutcliffe |
| Is electrical insulation as good in wet conditions? | Alan Wilkins
Hyder Consulting |
| Polymer absorbs little water, so insulation is not much affected. | Philip Sutcliffe |
| Any system will suffer conduction through surface water. | Prof. Lesley |
| Will expansion cause rail to bow upwards when warm? | Unidentified |
| There would be a tendency but the temperature change throughout the rail mass is small and street-laid rail does not normally suffer from this. We are looking into this at the moment. | Philip Sutcliffe |
| We did a failure test and the concrete failed before the polymer. | Prof. Lesley |
| Calgary has had no problem with a similar system. | Philip Sutcliffe |
| Are the underground vaults in Bath going to cause problems? | Unidentified |
| Without exact details it is difficult to be definitive but LR55 is very good at spanning gaps, much better than normal track. | Philip Sutcliffe |
| Is maintenance of Statutory Undertakings a problem? | Unidentified |
| No, we can work on repairs with the tramway system still running by using appropriate safety measures. | Philip Sutcliffe |
| Suitable safety procedures have been agreed for Edinburgh. A catastrophic failure of gas or water main (a 1/40 year event) would close the tramway anyway; it is cheaper to leave plant in-situ. | Prof. Lesley |
| What is the cost per metre? | Martin Willey |
| No cheaper than conventional track but major savings in installation costs and reduced disruption. – about £750 per metre | Philip Sutcliffe |
| 3.5 Km track in the centre of Manchester cost £14M to install, with LR55 that should reduce to £5M. | Prof. Lesley |
| Could the rail section be laid directly on the surface? | Unidentified |
| It could, depending on circumstances. | Philip Sutcliffe |
| When bomb exploded in Manchester, track was laid on surface. LR55 was wanted for this but, at the time, could only be cast in short lengths so was not quickly available. | Prof. Lesley |
| Would there be any problem, with A.C. traction current rather than the usual D,C, ? | Unidentified |
| The type of rail should make no difference. | Prof. Lesley |
| Would the figure of LR55 costing 30% of conventional, based on the Manchester example, apply more generally? | Unidentified |
| Yes when the cost of installation is considered. | Philip Sutcliffe |
| Has the Railway Inspectorate been informed of LR55? | Unidentified |
| They have been closely involved at every stage of the development. Sheffield installation has approval, including skid resistant material. | Philip Sutcliffe |
| What sort of approval? | Unidentified |
| The specific installation is approved, general approval is not normally given, especially on skid-resistant material. | Prof. Lesley |
| What is the coefficient of friction? | Unidentified |
| On skid-resistant material it is similar to asphalt, the rail surface is 0.3 | Prof. Lesley |
By
BRIAN LOMAS
Light Rail Transit Association.
Our purpose today should be to promote public transport as a real alternative
to the private car, we are not arguing buses against trams, they both have
a part to play.
The talk was accompanied by 30 photographic slides and some overhead
transparancies which illustrated various aspects of European tramways:
Britain has scrapped most of the tramways which previously
served the towns and cities. The ‘family silver’ was not sold, it
was thrown into the dustbin.
This country has long shown a preference for double-decked
trams [Blackpool 1970] but single-decked cars, with or without trailers,
are preferred elsewhere [Basle]. To counteract motor-car expansion,
the modern-looking P.C.C. tram was developed [Brussels]. For greater
economy of working, articulated cars allowed large carrying capacity with
a crew of only two,
(later 1), [Brussels].
In recent times the low-floor vehicle has been developed
to permit easy accessibility for wheelchairs and push-chairs [Grenoble].
With multiple doors, the loading time is very much reduced [Kassel].
Older vehicles can be converted by adding a low-floor centre section [Mannheim,
Freiberg]. By timetabling the limited supply of newer vehicles at well
publicised times, low-floor users know when they can travel.
By having fewer seats and more standing room, large
crowds can be accommodated; standing in the tram rather than standing at
the stop. The smooth ride on rails makes this acceptable, sometimes
standing is preferred even though seats are available.
In pedestrian areas the tram is safe because its
course is totally predictable [Freiberg], cafe tables can be placed
adjacent to the route, free from danger, fumes or noise. Narrow streets
are suitable for tramways [tram going through ancient archway
in Freiberg]. Interlaced track permits two-way operation in narrow
streets [Ulm?]
Many continental cities, of similar size and character
to Bath have tramways. [Berne, Grenoble, Basle, Ghent]. Tracks
can be grassed-over [Grassed track ?]. In St Etienne 40% of all
public transport passengers are carried by a single line. Karlsruhe
has
an integrated rail and road system.
Ticket validators without any advanced technology
work perfectly well [Mannheim]. The advantage of computerised
tickets is for management purposes but their statistics do not show why
non-travellers aren’t travelling or whether travellers would prefer another
method if it were available.
Integrated transport systems can use zones, irrespective
of means of transport, as the basis for charging [Rhein Ruhr]. Tickets
can be used on bus, tram, local trains etc. but are not valid on inter-city
rail. Sometimes buses are excluded from the city centre [Mannheim].
Sequential services use the same stop, no searching for the right bus stop,
no pay-on-entry so loading is
faster. Interchange journeys make the best use of city- centre
routes provided the interchange is conveniently arranged. One ticket
can be valid for 5 people mirroring the pricing structure of the car [Köln
Bonn].
Rail-based Park + Rides do not need a dedicated
service, they adjoin normal tram services, thus overcoming some of the
problems of bus-based P + R [Köln Bonn]. With Bike +
Ride, the use of zonal ticketing means that there is no need to take
the bike into the city[Delft].
Trams can carry 4 standing passengers per square
metre, a level which is reasonably comfortable due to the smoothness of
the ride, but can carry 8 per m2 at crush loading. It is this ability
to cope with sudden surges that makes the tram so effective.
SUMMARY
Trams are not an easy public transport option; if
operators want an easy life, they should use buses; but the danger is that
this could lead to lazy operation. Trams must be properly installed
and operated. Whilst proper operation of a tramway will give a service
second-to- none, haphazard operation would bring the system to a halt,
leaving no room for complacency.
Reducing the cost of tramway systems is always desirable
but there is no single mode of transport which will solve the traffic problems.
Integration of bus, tram and train is the only successful solution.
"There is hardly anything in the world that some man cannot make
a little
worse and sell a little cheaper and the people who consider
price only are
this man's lawful prey." – John Ruskin
DISCUSSION
| Aren’t the problems of introducing trams in Bath (and other towns)
lack of
council incentive, lack of local finance and lack of transport strategy? |
Roger Newport
|
| Yes. Most other countries have a strategy which takes environmental
and
social factors into the equation, not just profit. |
Brian Lomas |
| Buses are loosing custom despite subsidy. Manufacturers are tending
to low
emission propulsion, reserved routes and guided docking. Marked-out routes are proposed for safety. . . Isn’t this a tram? |
John Parry |
| City-centre dwellers derive no benefit from P+R. ––
Bus fares are
prohibitive so I use my car. When public transport becomes cheap, people will use it regardless of mode. |
Unidentified |
| Too-cheap fares will eventually run the system into the ground. A suggestion for London: compulsory day ticket to enter the city would mean you had already paid so you may as well use public transport. Various ingenious ticket schemes work on the continent. | Brian Lomas |
By
COLIN ROBINSON
Trampower Ltd.
Mr Robinson sent apologies for his absence which was caused by a
broken leg.
He was represented by PROFESSOR LEWIS LESLEY
A photograph of London at the turn of the century,
shows all trams and one bus. Thirty years later the situation had
reversed.
Trams were expensive because they were ordered in
small numbers, unique designs, few repeats, no economy of scale.
Buses used production engines and drive components, in common with lorries.
This is the philosophy behind the new TRAM vehicle.
Trams last a long time, [a slide was shown of
a Blackpool tram] this vehicle is 63 years old (average fleet age over
60 years). It was used as a test-bed for the new hardware before
that was incorporated in the TRAM vehicle.
REQUIREMENTS FOR A NEW DESIGN OF VEHICLE
Market research established passenger transport authority requirements:-
Low floor (350mm) over at least part of vehicle.
Max. speed . . . . . . . . . . . . 50 m.p.h.
Braking & acceleration . . . 1.2 m/s/s
Horizontal curve radius . . . 25m
Max. gradient . . . . . . . . . . . 8%
D.C. overhead power
Length . . . . . . . . . . . . . . . . .28m
Weight . . . . . . . . . . . . . . . . 42 tonnes
Passengers . . . . . . . . . . . . . 200
Manchester vehicles partly meet this specification; but could we do it at lower cost than their £1.5M each in 1990, (or £1.8M nowadays)? Sheffield trams are 33m long, weigh 56 tonnes and cost even more, £2.1M
THE NEW DESIGN
The ‘TRAM’ vehicle has been designed to exceed the
required specification, it has a higher maximum speed, higher acceleration
and braking. It can tackle tighter corners, steeper hills, has a
lower low floor and is slightly longer.
The prototype weighs 22.2 tonnes and carries 200
passengers. The body is standard for all models giving economies
of scale; a replaceable nose- cone allows visual customising.
Reduced weight allows 10 wheels to be used instead
of 12 and the low floor extends right through the centre section allowing
flexibility of seating / standing arrangements.
A full-size mock-up has toured the country doing
market research which showed that car-users would be attracted to use it.
(Main criticism:- seats too hard, they have now been replaced).
When left on display at Liverpool Airport, passengers
frequently climbed aboard and were disappointed to be told it wouldn’t
leave for two years. 95% then refused the offer of an alternative
bus and took a taxi instead.
CONSTRUCTION
The body comprises two identical end sections joined
by a short centre articulation. It is built of stainless steel panels
on a monocoque stainless steel rectangular-section tube frame, guaranteed
for at least 30 years. The sides and roof are formed from two ‘ladders’
with hoops. It could be built locally with low-tech facilities, Colin
Robinson built the prototype by hand in a workshop in Cardiff. Each
nose cone is a fibreglass moulding with no structural responsibility and
can take any shape. The bogies, which weigh 2 tonnes (Manchester
bogies weigh 6 tonnes), were tested for 2 years under an old Blackpool
tram which became very lively as a result It was shipped to Blackpool on
three lorries as a kit and assembled in 7 hours. After trials, it
passed its Railway Inspectorate examination in Easter 1998.
Photographs show there are 4 double doors in each
side of the low floor area and one by the driver’s cab to allow one-man-operation
during Blackpool’s winter season. The vehicle can use ordinary washing
plant and will go around a 15m radius curve permitting operation in virtually
any street.
The cost should be well under £1M each.
DISCUSSION
| What traction power and regeneration arrangements are used? | Unidentified |
| Three phase motors with flux vector control giving automatic regeneration on braking. Regeneration can only save power if there is another vehicle in the area at the time to accept it. By halving the weight of the TRAM we have saved power. | Prof. Lesley |
| Would you foresee planning problems with the overhead wires in Bath? | Unidentified |
| Tell people the Romans put them up. | Prof. Lesley |
| What advantage does this system have over the one presently under
consideration by the Council? |
Unidentified |
| The consultants are aware of this technology so we await their report. | Mike Finch |
| The vehicle can be made to any required length and style to suit
circumstances. |
Prof. Lesley |
| Have different track gauges been considered? | Unidentified |
| Yes, a metre-gauge version is available, narrow gauge is used on the
continent. If part of the track might use railway line, standard gauge should be used throughout. |
Prof. Lesley |
| Narrow gauge might help in shared bus lanes. | John Parry |
| Are there cities the size of Bath with viable tram systems? | Unidentified |
| Freiberg, Saltzburg, Innsbruck, Strasbourg, Heidelberg, Basle + many others. Basle has 150 trams and 60 buses, the buses are being phased-out to control air pollution. | Prof. Lesley |
| Rather than confining a tram system to the City area, could it be extended
to
cover surrounding rural areas such as Radstock along the disused S&DJR track. |
Unidentified |
| It has not been taken into account at the moment. | Mike Finch |
| Already 1200 new houses in Radstock area with no public transport, we will have to think of an extended tramway system in the near future. Good public transport to Bath and Bristol is the key to prosperity in the Radstock area. | Derrick Hunt |
| An inexpensive narrow-gauge system with extensions to Norton-Radstock has already been proposed | Paul Bennett |
| I hope different gauges are not chosen for Bath and Bristol.
High car
ownership areas must be targeted first, to pay-off construction costs and enable extension to socially deprived areas later. |
Prof. Lesley |
| On behalf of Bath Disability Policy Forum, may I ask Council to consider us in their consultations. Disappointed by new buses but pleased at information on new trams. | Unidentified |
| New laws: all new public transport vehicles must be accessible to disabled
people. Even so, stops may not be accessible and parked vehicles may block access to a bus. Trams always pull up in the same position. |
Prof. Lesley |
| Does Council have firm plan or does it sit on fence? | Unidentified |
| It sits on fence. Plan is based on land use, owners must give
permission.
Railway land has been built on. Consultants’ report awaited in a week or so. |
Mike Finch |
| Understandable position but S.W. England is very special. The ‘market place’ is now partly driven by the environment. | Martin Willey |
By
MARTIN WILLEY
(Chair)
Today we have seen an impressive spectrum of opinions and ideas, informative
rather than confrontational. From the presentations it is clear that:-
1) We have a problem.
2) Technology could help us.
3) Much information still needed. (Marketing forecasts).
4) Existing infrastructure and operators must be involved.
5) Controls must be combined with incentives.
6) £millions will be needed.
7) Council should give more consideration to ideas so as to be first on the
starting line.
Integration of transport will be the only successful solution, not
individual lobbies.
Drive for change will come from the public. – This is no longer a minority issue.
We must use today to move forwards.
Is a group which supports the
installation of a modern electric tramway network as the core of an
integrated
public transport solution to Bath’s traffic problems.
If you support the aims of the group and would be willing to help us
achieve
those aims, please contact:-
Adrian Tuddenham,
88, Mount Road,
Southdown,
Bath BA2 1LHTel: 01225 335974
email ATuddd@aol.uk
Opinions expressed are entirely those of the speakers
To go (back) to the Trams for Bath site click here
To go (back) to the LRTA (Light Rail Transit Association) site click here
To go (back) to the Tramdev site of Brian Lomas click here