If the Orange County Transportation Authority doesn't widen the San Diego (405) Freeway in Costa Mesa, an existing bottleneck could relocate from Fountain Valley to Costa Mesa, transportation officials said Tuesday.
In his update to the Costa Mesa City Council about OCTA's three scenarios to improve the 405, project manager Niall Barrett said extending the project into the section south of Euclid Street onto the Corona del Mar (73) Freeway is the best option to manage congestion.
If the proposed widening beginning at the San Gabriel (605) Freeway stops at Euclid in Fountain Valley, as outlined in one scenario, the bottleneck will shift to Costa Mesa, Barrett said.
"We can't build our way out of the problem on the 405," he said. "It's congestion management."
OCTA is looking to widen the freeway — Southern California's busiest — either one or two lanes in each direction between the 605 to the north and either Euclid or the 73 to the south.