Urban Structure

Chokepoints for Effective Transit: The Example of Seattle

Seattleskyline1cropped In December, Alex Steffen wrote a provocative article at Worldchanging proposing that Seattle aim to become North America’s first carbon-neutral city.  I’m not an expert on carbon-neutrality as a whole, but I can certainly comment on the transport dimensions of it.  Here are some reasons to bet on Seattle, in particular, as a place that might get closer to carbon-neutrality in transportation than most other North American cities.  Ultimately, all of these are about geography. Continue Reading →

Why Isn’t Through-Routing More Common?

All-new-york-rail-lines-3A reader asks:

[Alon Levy’s] post on The Transport Politic about through-routing commuter rail in New York brought up a question I’ve had for several years regarding transit systems. Why isn’t through-routing more common? This applies to rail, BRT, regular bus, etc. It seems that through-routing all or most of a city’s lines via a central transit center provides all the benefits of the “hub-and-spoke” model but also eliminates the need for transfers for a significant minority of people. Is there a downside or cost that isn’t apparent at first?

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How Paris is Like Los Angeles (via New York)

All-new-york-rail-lines-3 Alon Levy, guest-writing at The Transport Politic, recently did a great piece proposing that the New York region’s commuter rail lines, which currently all terminate in Manhattan, should be connected to each other so that trains would flow through, for example, from Long Island to New Jersey and back.  The inspiration, of course, is the Paris RER, a system in which commuter rail lines on opposite sides of Paris flow across the city into each other.  Because all these commuter trains, merged into a common city segment, add up to reasonably high frequency, the RER also serves as an “extra-rapid metro” connecting major centres across the city with trips making just a few stops.  Alon’s plan  (part onepart two) is a great read, as is Cap’n Transit’s response to it. 

Such a system would be wonderful if it existed today.  Commutes from Long Island to New Jersey would certainly be much easier, and it would also be great to get the space-consuming and time-consuming end-of-line functions out of the core.  

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