Motorists scrambling to dart across three lanes of traffic when merging onto the freeway. Vehicles slowing to a crawl due to extremely curved exit ramps. Commuters enduring agonizing backups as three freeways converge in a tight footprint. Bicyclists and pedestrians sweating through long detours to traverse freeways.

Reprinted courtesy of Scott Blair, Engineering News-Record

Mr. Blair may be contacted at blairs@enr.com

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