Michael Cassidy

Title
Professor of Transportation Engineering
Department
Dept of Civil and Environmental Engineering
Phone
(510) 642-7702
Fax
(510) 643-8919
Research Expertise and Interest
traffic and transportation operations, traffic control

In the News

October 10, 2011

Kicking hybrids out of carpool lanes slows all traffic

The end of a California program granting free access to carpool lanes by solo drivers of hybrid cars has unintentionally slowed traffic in all lanes, according to a new report by researchers at UC Berkeley’s Institute of Transportation Studies. It turns out that when regular-use lanes became more congested with the addition of more hybrids, the carpool lanes slowed down as well. The transportation engineers explain this counterintuitive result.

In the News

October 10, 2011

Kicking hybrids out of carpool lanes slows all traffic

The end of a California program granting free access to carpool lanes by solo drivers of hybrid cars has unintentionally slowed traffic in all lanes, according to a new report by researchers at UC Berkeley’s Institute of Transportation Studies. It turns out that when regular-use lanes became more congested with the addition of more hybrids, the carpool lanes slowed down as well. The transportation engineers explain this counterintuitive result.

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