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  •  Overhead wires (0+ / 0-)

    are expensive to erect & maintain, and can be dangerous if they come down in an accident or storm. They're also problematic when transporting large objects and can get in the way of parades, etc. They're fine on private rights-of-way (e.g. light rail or dedicated busways), but I don't see them coming back to public streets.

    •  San Francisco's Trolleybus System (1+ / 0-)
      Recommended by:

      was built to replace existing streetcar lines when MUNI bought the private MSR in 1944.  So, the poles and lines already existed.  All that was required was converting single-wires to double-wires.

      I agree mostly.  I don't really see trolleybuses sweeping the world.  Hybrid buses would be a better energy-efficient solution for most places.

    •  Funny... (2+ / 0-)
      Recommended by:
      bara, MyBrainWorks

      In all of those European streets of all of those European cities, I have almost never heard of accidents involving downed "live" wires.  I believe they have a very effective tripping system for such a problem, which is much better than our overhead power lines do here in the states.

      And are power lines on rubber-tired buses really more expensive than dedicated light rail lines to erect.  This I have no data on, but find very hard to believe.

      And parades...?  Should a parade route really be a significant factor in energy choices involving transportation?

      Really, WWFSMD?

      by sp0t on Thu Jun 28, 2007 at 02:45:54 PM PDT

      [ Parent ]

    •  Seattle had, took them down, put them back up (2+ / 0-)
      Recommended by:
      N in Seattle, MyBrainWorks

      although on fewer routes than they once were.  And some of the buses are dual mode, electric in the city core, diesel in the outlying regions.

      They have avoided getting into situations where much crossovers or switching is needed, as that does make things more complicated.

      Traffic lights and directional signs tend to be at the same level as the bus power lines, so the issue with getting in the way already exists for reasons other than buses.

      •  With new battery technology, plus new ... (0+ / 0-)

        ... microcontroller technology, compared to the first big wave of trolleybus popularity, it should be straightforward for the trolley poles to be withdrawn automatically to deviate from the electrified line of travel, traverse intersections, or go beyond the limit of the electrified route on battery power alone. and Energize America

        by BruceMcF on Fri Jun 29, 2007 at 07:21:50 PM PDT

        [ Parent ]

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