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View Diary: Sunday Train: A Streetcar Named BRT (94 comments)

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  •  San Francisco has trolley buses (0+ / 0-)

    They work great, except that occasionally a boom falls off the wire and has to be reconnected.

    On Market Street, they share wires with the historic streetcars.  No problem at all.

    I think the newer SF trolley buses have battery back-up so they can slip off the wires and run free for a few blocks, which is great for routing flexibility.  However, you do need someone on the street to pull the booms down and reconnect them.  OTOH, good union jobs are a good thing.

    Big Joe Helton: "I pay Plenty."
    Chico Marx: "Well, then we're Plenty Tough."

    by Caelian on Mon Aug 22, 2011 at 02:39:37 PM PDT

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    •  The Market Street Railway (0+ / 0-)

      Like this:

      San Francisco No.1

    •  Manually resetting the trolleypoles ... (0+ / 0-)

      ... is something that discourages adoption of trolleybuses, and discourages use of trolleypoles with streetcars so discourages sharing of trolleybus and streetcar electrification.

      A system that can align the trolleypoles at the start of each powered segment is definitely required for the approach of electrifying the most energy intensive segments of the route ~ the stations ~ and relying on some form of energy storage for the segments in between.

      Of course, that does not require aligning the trolleypoles when the bus is in motion, if the start of the powered section is at the station itself ~ in which case the dynamic braking goes to recharge the power storage ~ but it would have to be automatic to be feasible. One person to manually realign trolleypoles at the end of an emergency detour because a downed tree is blocking the road is one thing ~ twenty people to realign the trolley poles at each BRT station on a ten mile corridor would be something else altogether.

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      by BruceMcF on Tue Aug 23, 2011 at 08:19:45 AM PDT

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