A fire apparatus still blocks streets in the area.
Wiedefeld wants to close the system at midnight from Monday to Saturday, and at 10 p.m. on Sundays.
A crash involving a dump truck closes part of Georgetown Pike in Great Falls, Va.
The delays come as Metro is slowing down the speed of trains on tracks because of the extreme heat.
Construction could begin in the spring and will last about two years.
More and more, transit agencies are opting for the "rip-off-the-Band-Aid" approach.
No passengers were injured, but five employees were disciplined for failing to adhere to safety rules.
Trains were restricted to 35 mph.
On average, a fire or smoke incident occurred at least once per day on Metro last month.
The bridge project requires a traffic detour near Washington Adventist Hospital in Takoma Park.