Tuesday, December 8, 2009
Rethinking congestion with new data
TomTom, the on-board GPS device people, have released their list of the 20 most congested cities using data collected from their devices. Seattle tops the list with 43% of the roads congested, which is a few percentage points worse than Los Angeles. It's a neat use of their data though it doesn't yet tell us much about congestion and cities.
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This tells us something--but not much. A measure of percentage of roads that are congested ignores the sheer mass of roads that cities like L.A. have. It could be an interesting measure of transportation design efficiency to some how cross examine this data with something like lane miles per capita??
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