1. Build more roads
USE GAS TAXES FOR THIS instead of bike paths, light rail, and other horrendously expensive wastes of taxpayer money.
2. Build more public transit.
TOTALLY USELESS. spend billions to move a few hundred people from where few people live to where almost no one wants to go. Yep that will work.
3. New technology.
Possibilities, for those of us who work on computers all day long it could work. For those who actually have to be somewhere to do something it's a non-starter. UNLESS, technology is used to synchronize traffic flow and traffic engineers change their priorities from maximally impeding the flow of traffic to actually trying to work out ways to get it to move.
Tank the economy so that no one has to go to work in the morning. Obama is working on the solution.