Study: Shaving time off drivers' commutes is simple
By taking as few as one in 100 drivers from those key areas off the roads, commute times could drop by more than 15 percent for the region, researchers say. That would shave off about ten minutes each way for people whose commutes are currently an hour.
I'll add that cyclists could easily be this one in 100 drivers. Of course the implied problem is how to get more people to bike in car centric areas (key areas), At least that's how I read it.
WTOP report.