Loading ...
Sorry, an error occurred while loading the content.

RE: WorldTransport Forum green transport hierarchy

Expand Messages
  • Wetzel Dave
    I fully agree with point 5 but disagree with point 3. 3. Small vehicles are only an advantage over large ones if the number of passengers is kept constant.
    Message 1 of 1 , May 30 8:26 AM
    • 0 Attachment

      I fully agree with point 5 but disagree with point 3.

       

       3. Small vehicles are only an advantage over large ones if the number of
      passengers is kept constant.”


      Suppose the demand is 360 paxs per hour on the route.

      This  number stays constant and does not vary.

      The demand can be met with 5 x 72 pax capacity buses or 10 x 36 pax capacity buses.

      The advantage of the 10 smaller buses is that you provide a more frequent 6 minute service than the larger bus every 12 minutes.

      The higher frequency may even attract more riders.

      But economics (and environmental needs) suggests the larger bus is the best option.

       

      “5. Why "don't ban street parking/stopping" at peak (or other) times ? Last week
      I did a bus trip in inner (but not central) London which took nearly an hour for
      about 4 miles -- because there were two diversions due to major road closures
      and in both cases the bus couldn't get through on its diversion route due to
      parked cars.”

       

      All bus routes should have double yellow lines banning parking around all road junctions and all pinch points.

       

       

      Dave

      Dave Wetzel,

      Vice-Chair, TfL

      020 7126 4200

       

       

      -----Original Message-----
      From: WorldTransport@yahoogroups.com [mailto:WorldTransport@yahoogroups.com] On Behalf Of Simon Norton
      Sent: Tuesday, May 30, 2006 3:56 PM
      To: worldtransport@yahoogroups.com
      Subject: WorldTransport Forum green transport hierarchy

       

      A few comments on Chris Bradshaw's paper.

      1. Use of public transport does have one important positive factor which should
      be factored in: it helps to keep the system going by reducing both cost and
      energy efficiency on a per passenger basis.

      2. In classifying modes of transport by energy source one must factor in their
      substitutibility. For example using hydrogen generated from renewable sources is
      not an advantage over fossil fuels if those renewable sources could otherwise be
      used to generate electricity that would otherwise need fossil fuels to generate.
      (And if the hydrogen is generated from fossil fuels it is no advantage at all
      except for local air quality.)

      3. Small vehicles are only an advantage over large ones if the number of
      passengers is kept constant.

      4. For trip purposes, multi-purpose trips will usually score higher than single
      purpose trips.

      5. Why "don't ban street parking/stopping" at peak (or other) times ? Last week
      I did a bus trip in inner (but not central) London which took nearly an hour for
      about 4 miles -- because there were two diversions due to major road closures
      and in both cases the bus couldn't get through on its diversion route due to
      parked cars.

      Simon Norton




      ***********************************************************************************
      The contents of the e-mail and any transmitted files are confidential and intended solely for the use of the individual or entity to whom they are addressed. Transport for London hereby exclude any warranty and any liability as to the quality or accuracy of the contents of this email and any attached transmitted files. If you are not the intended recipient be advised that you have received this email in error and that any use, dissemination, forwarding, printing or copying of this email is strictly prohibited.

      If you have received this email in error please notify postmaster@....

      This footnote also confirms that this email message has been swept for the presence of computer viruses.
      ***********************************************************************************

    Your message has been successfully submitted and would be delivered to recipients shortly.