Use Metro. Bike. Walk. Do anything but try and drive in the District of Columbia on Saturday, officials say. Between Howard University’s commencement, featuring an address from Oprah, the National Asian Heritage Festival, the National Police Week 5K Race and the 28th Annual DC101 Chili Cook-Off, street closures and a bounty of extra pedestrians are certain to put a damper on vehicular access to the nation’s capital.

– For the Asian festival: Pennsylvania Avenue Northwest will be closed between 3rd and 6th streets from 2 a.m. to 11 p.m.