Sorry Hank, that wouldn't have a significant effect on traffic congestion around here. Traffic engineers who aren't being muzzled by their agencies agree that we simply can no longer build our way out of traffic congestion. They will say, however, that interchanges are the number one cause of freeway congestion and traffic delays. Eliminating most or all urban freeway interchanges would keep traffic moving, instead of vehicles constantly getting on or off the freeway, which causes the slow downs which lead to congestion. However, eliminating all the interchanges wouldn't allow the urban freeway users to get where they are going via freeways, which could be a major traffic improvement, depending on one's perspective.

EVs might have that effect in the Bay area. Here we could charge up our EVs at night using electricity that we otherwise would just transmit to CA, wasting it, as it were.

Sg