 Security checkpoints will open at 1 p.m. Most of the access points are either on Constitution Avenue or Independence Avenue west of 15th Street or by the Jefferson Memorial. And don't forget, the Metro can be key to making it to your July 4th celebration safely and without hassle. Metro hours run 7 a.m. to midnight, and all rail and bus rides after 5 p.m. are free. On the National Mall, Grace Newton, WTOP News. We've got all things 4th of July and a list of those road closures at WTOP.com.