SEPTA's trolley tunnel in Center City will be closed for maintenance during part of the weekend.
The tunnel will be closed from 5 a.m. Sunday through 5 a.m. Monday, the transit agency said.
During that time, trolley routes 11, 13, 34 and 36 will start and end their routes at 40th and Market Streets. Route 10 trolley routes will start and end at 40th and Filbert Streets.
Trolley riders should use the Market-Frankford Line for the rest of their trips to and from Center City.
The closure is due to construction and maintenance work, SEPTA said.