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Major Causes of Traffic Congestion in the U.S.Bottlenecks (traffic demand exceeds roadway capacity) | 50% of total congestion | | Traffic incidents | 25% of total congestion | | Work zones | 15% of total congestion | | Bad weather | 10% of total congestion | | Poor signal timing | 5% of total congestion |
Source: American Highway Users Alliance, Unclogging America's Arteries, 1999–2004. Web: www.highways.org.
Information Please® Database, © 2007 Pearson Education, Inc. All rights reserved.
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