The Vexing zlib Problem with Snow Leopard

Traceback (most recent call last): File “/usr/local/bin/virtualenv”, line 5, in from pkg_resources import load_entry_point zipimport.ZipImportError: can’t decompress data; zlib not available Seen this when working with python on OS X 10.6 (Snow Leopard)? This seemingly came out of nowhere when I wanted to set up a virtualenv on a macbook pro that hadn’t been used … Continue reading

The Scandal of Chevy Volt-Gate!

The Scandal of Chevy Volt-Gate!

Ho-hum, it’s another attack on alternative vehicles for being too expensive. Now it’s the Volt.  Then it was the Prius; the issue being that the premium for the hybrid electric vehicle did not make economic sense with gasoline below $5/gallon.  What such analyses always neglect is that a car is not a purely rational purchase … Continue reading

Why Games (for transportation research)?

There are a lot of dimensions in transportation research. Every January the Annual Meeting of the Transportation Research Board (TRB) hosts a conference with 10,000+ attendees, and more than 4000 presentations. Just about everything that you can imagine is covered, and some things you can’t: urban planning, mass transit, vehicle technologies, road engineering, rail, freight, … Continue reading