DC Metro User's Guide
Riding in the DC Metro System
Train cars provide sitting and standing room. During off-peak time, there is normally plenty of room, but during weekday commutes and special events, cars can become very crowded. It is important to note that seats near the car doors are reserved for the elderly and disabled, and should be forfeited if needed.
Bicycles are also allowed on Metro, except during the busy hours of 7-10 am and 4-7 pm on weekdays, and the 4th of July or during other special events with large crowds. Bicycle riders must use elevators, and should use the end doors (as opposed to the center doors) of any cars. Up to two bicycles are allowed in each car on weekdays, and up to 4 on weekends.