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photos of traffic merging onto congested highway, congestion in snowstorm, variable message sign, cargo, variable speed limit sign in a work zone, and a freeway at night
21st Century Operations Using 21st Century Technologies

Traffic Bottlenecks

Traffic Bottlenecks > Combating Bottlenecks

Combating Bottlenecks

San Francisco

"Thus, a perennial member (4th worst in 2008) of the nation's top 10 worst segments was dramatically improved (now 491st in 2009) with some new paint."

In the San Francisco Bay area, restriping in early May 2009 expanded the ramp between I-580 WB and US 101 NB in Marin County from one to two lanes in a work zone. As a result, an upstream segment of I-580 WB that approached and included Bellam Boulevard saw significantly less congestion, enough to drop from 4th nationwide in 2008 to 491st. Thus, a perennial member of the nation's top 10 worst segments was dramatically improved with some new paint.