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City Speak XI - Is transport the solution or the enemy? Pascal Dupont of Alstom



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Development and transport are closely related, but how do we connect the dots and guarantee a livable city for future generations?

Lifting the moratorium in Mid-levels, reducing the threshold for redevelopment and the constant pressure to increase density are all choking the older parts of Hong Kong with more traffic and roadside air pollution.

How do we deal with the increased traffic on new roads to the Mainland? How many more roads are we planning to build on our waterfront? Is there too much public transport clogging up our roads? Is replacing pedestrian crossings with subways and footbridges a good thing?

What plans are there for environmentally friendly transport and aesthetically more pleasing transport infrastructure in Hong Kong? Where are the hopes for making our city more pedestrian-friendly? Can new engine technology solve our problems? Could electronic road pricing help? Will the new rail lines be enough? Do we have a sustainable (transport) plan for our city?

Planners, engineers, academics and officials will discuss whether transport is our solution or our enemy.

Designing Hong Kong is a not-for-profit organisation focused on sustainable urban planning. See:

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City Speak XI - Is transport the solution or the enemy? Pascal Dupont of Alstom

  1. 1. 24/04/2010 <ul><ul><li>Evolution of technologies </li></ul></ul><ul><ul><li>on modern tramways </li></ul></ul><ul><li>Pascal DUPOND </li></ul>
  2. 2. Why a green approach to rail saves operators and cities money?
  3. 3. Reducing the environmental impact of the trains from production to recycling 98% of easily recyclable materials
  4. 4. Less energy consumption: implemented in all our product range
  5. 5. Commitment on sustainable mobility, thanks to new technologies <ul><li>Reduction of energy consumption </li></ul><ul><ul><li>Use of composite materials </li></ul></ul><ul><ul><li>Improvement of the traction systems’ efficiency </li></ul></ul><ul><ul><li>Reduction of the weight </li></ul></ul><ul><ul><li>energy consumption down by 10% </li></ul></ul><ul><ul><li>in terms of Kwh/passenger, a modern tramway is four times more economical than a bus, and ten times more than a car </li></ul></ul>
  6. 6. Commitment on sustainable mobility, thanks to new technologies Less noise and vibration emissions Energy saving solutions Less particles emissions
  7. 7. Development of new technologies: focus on power supply Why alternative power supply solutions? Traditional Power collection is via an Overhead Contact Wire (OCW), which necessitates a dedicated unsightly infrastructure. Removal of Urban Clutter Cities with historic center and buildings wanted an alternative to the OCW to eliminate the “clutter” created by the tram infrastructure.
  8. 8. <ul><li>Preserve urban environment </li></ul><ul><li>To facilitate access in narrow streets, facade renovation, … </li></ul>Development of new technologies: focus on power supply
  9. 9. <ul><li>Two main types of Alternate Solutions were developed : </li></ul><ul><ul><li>Full performance solutions (Alternate Power Supply or APS) : </li></ul></ul><ul><ul><ul><li>Rely on a wayside infrastructure to provide power to the vehicle </li></ul></ul></ul><ul><ul><ul><li>Need an interface between the vehicle and the wayside </li></ul></ul></ul><ul><ul><li>Limited performances solutions (On Board Energy Storage Systems or OBESS) that mix : </li></ul></ul><ul><ul><ul><li>A standard or alternate full performance infrastructure and </li></ul></ul></ul><ul><ul><ul><li>One or more dedicated on-board energy storage system(s) </li></ul></ul></ul>Development of new technologies: focus on power supply
  10. 10. Impact on the landscape, thanks to new technologies 1 - Ground level power supply via a 3 rd rail embedded in the tracks (APS)
  11. 11. <ul><li>Segmented street-level power rail </li></ul><ul><li>Conductive segments Switched off-on-off as tram progresses </li></ul><ul><li>Safety rule: Conductive segments energized under tram only. </li></ul><ul><li>Safety rule consequence: All segments outside tram at 0 Vcc </li></ul>Development of new technologies: APS
  12. 12. Development of new technologies: APS in Bordeaux Facilitates road crossings and emergency service access Facilitates maintenance of city equipment Offers a total safety to pedestrians and road users
  13. 13. Impact on the landscape, thanks to new technologies 2 – On Board Energy Systems Storage (OBESS)
  14. 14. <ul><li>Several On-board Energy Storage Systems (OBESS) have been developed : </li></ul><ul><ul><ul><li>Batteries, in operation since 2007 in Nice France </li></ul></ul></ul><ul><ul><ul><li>Super Capacitor, in operation on line T3 in Paris since August 2009 </li></ul></ul></ul><ul><li>OBESS performances are not similar : </li></ul><ul><ul><li>Batteries </li></ul></ul><ul><ul><ul><li>Can store large quantities of energy </li></ul></ul></ul><ul><ul><ul><li>Have low power to mass ratio, </li></ul></ul></ul><ul><ul><ul><li>Life is affected by charge/discharge rate and temperature </li></ul></ul></ul><ul><ul><ul><li>Are Expensive </li></ul></ul></ul><ul><ul><ul><li>Are better suited to provide quasi continuous loads over several minutes </li></ul></ul></ul><ul><ul><li>Super Capacitor </li></ul></ul><ul><ul><ul><li>Have high power to mass ratio </li></ul></ul></ul><ul><ul><ul><li>Have a small effective storage capacity </li></ul></ul></ul><ul><ul><ul><li>Life is affected by maximum cell voltage and depth of discharge </li></ul></ul></ul><ul><ul><ul><li>Are well suited to handle large power burst over short time period </li></ul></ul></ul><ul><ul><ul><li>Still require the overhead system or the APS to handle long inter station, grades and intensive use of the air conditioning. </li></ul></ul></ul>Development of new technologies: OBESS
  15. 15. Development of new technologies: OBESS in Nice & Rotterdam
  16. 16. Modern tramways: new design opportunities A backdrop for creativity Image of the city associated to the image of the Tramway Adoption and assimilation by inhabitants (nicknames of Tramway systems…)
  17. 17. Interior designs to meet new higher expectations from passengers : comfort, information… Modern tramway: new design opportunities
  18. 18. Modern tramway: new design opportunities
  19. 19. Modern tramway: new design opportunities
  20. 20. Modern tramway: is it adequate for Hong Kong?
  21. 21.

Editor's Notes

  • 这张图片体现了阿尔斯通有轨电车在内装方面的几个特点:舒适度,安全度,现代感 Comfortable, safe, modern
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