However it shakes out, the prospect of the eclipse of our current auto capacity today or on Monday is going to be a great time to think about the geometric limits of auto capacity.
Simply put: Cars are space hogs.
ODOT knows: Cars use space and funding inefficiently! |
But at the level of budgets and funding, they are in deep, deep denial. (City Observatory has some recent analysis of this: "What a congestion report doesn’t tell us about congestion," "Dying to widen highways," and "Why we’re talking about Portland’s freeway widening proposal."
Cars in motion take more space than we think.
One way cars consume space |
Downtown Surface Parking Lots in Red Parking Garages in Solid Brick Red On-street parking stalls not included (click to enlarge) |
SE Corner of Chemeketa and Commercial, then and now Then: Eldridge Block circa 1940, Salem Library Inset, today: Chemeketa Parkade (Click to enlarge, more examples here) |
Space hogs: Drive-alone trips vs one big bus (See the great twitter thread by Brent Toderian, credit unknown) |
Capacity and through-put (from Terra Nova, by Eric Sanderson, via "Forget the Damned Motor Car") |
Only after the Eclipse on Monday was there a problem with gridlock, and it was mostly on the highway. From ODOT, here's the average traffic speed charted on two segments of I-5, with the Eclipse-related slowdown very clear:
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