In my opinion, the easiest and cheapest way to mitigate that congestion is to open up El Camino to three lanes in each direction, just like in Redwood City and Palo Alto. Traffic snarls up in downtown Menlo Park already due to this head-scratching lane reduction.
The city could simply decide to wipe out the parking spaces on El Camino, send out a crew with a few cans of paint one night, and restripe El Camino to three lanes without having to pour a single gallon of asphalt. This simple expedient would make a big difference to traffic downtown right now, much less in the future after the plan is adopted.
Brian Schar, Laurel Avenue, Menlo Park