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arlington and Alex are about to implement a transitway between Crystal City and Potomac Yard. It will have a mix of dedicated and general lanes, with the option to increase the dedicated portion. It seems an excellent way to get dedicated ROW for transit quickly and cheaply, and I hope Arlington County has a more positive view of its prospects, and will work hard to ensure its success. I note that Arlingon at least, hopes to convert to add rail - but IIUC it would then still be open to buses, as there are many bus lines that service the area that extend well beyond where rail will go. The need to deal with drivers coveting the lanes will still exist - laying rail down does not prevent that - since street cars can function with autos (as is proposed on Columbia Pike and in DC). You could have a completely offstreet, unpaved, light rail like much of Baltimore's system, but that relies on the availability of ROW, and does not allow for sharing the ROW with buses.

Heavy Rail obviously is immune to sharing - its a very different animal though - much higher capital cost, but much higher capacity.

by AWalkerInTheCity on Jul 12, 2012 10:49 am • linkreport

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