WSDOT caters to the Seattle area techie crowd very well, making use of online traffic maps and Twitter to keep us moving.  They also have a blog with analysis and background info for when we’re not behind the wheel (and they discourage tweeting while driving).  Their glimpses behind the scenes on YouTube are fun and informative.  Here’s one about how they’ve borrowed a laser retroreflectivity van from the Oregon DOT to measure whether road stripes need to be repainted: