San Diego’s ‘Nightmare Interchange’ At I-5 & 78 May Finally Get Fixed


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The notorious interchange between State Route 78 and Interstate 5 may be upgraded with federal infrastructure money, reports the San Diego Union-Tribune.

During a presentation in Oceanside with County Supervisor Jim Desmond and Encinitas Mayor Catherine Blakespear, Rep. Mike Levin, D-San Capistrano said the planned modifications would increase traffic flow, reduce vehicle emissions and improve public safety.

This interchange is often a traffic nightmare,” said Levin. “It simply cannot handle the number of cars that are driving through here on a regular basis, particularly during rush hour, leading to gridlock and more idling vehicles that increase air pollution. The traffic as a result of this interchange is also a serious public safety issue.”

Currently, vehicles in the westbound lanes of state Route 78 must wait at a stoplight to turn south to get onto Interstate 5.

Officials plan to build a flyover overpass that would route cars over existing lanes. It would replace the traffic light and allow vehicles on state Route 78 to merge onto I-5 without stopping or slowing.

“It’s been on the wish list for the region for many years,” said Desmond.

According to Levin, the federal Department of Transportation will provide $4.8 billion to California immediately and CalTrans will administer the money within the state.

The North County interchange project will need two or more years for environmental review and engineering plans.


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