Philadelphia trolley passengers will have to temporarily adjust their commutes to accommodate maintenance.

SEPTA will shut down its trolley tunnel in Center City from 10 p.m. Friday, July 13, until 5 a.m. Monday, July 23, to complete its annual maintenance blitz, consolidating a number of repairs into a short time.

The shutdown will affect Routes 10, 11, 13, 34, and 36, which all will be diverted to the 40th and Market Streets station. At 40th Street, customers will be able to transfer to the Market-Frankford El to Center City.

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SEPTA is encouraging late-night travelers to use the Market-Frankford's weekday Night Owl bus service and the all-night subway service on weekends for trips to Center City.

For those transferring at 40th Street, tents will provide temporary shelter and signs will have additional details about boardings, routes, and closures.

During the closure, SEPTA workers and third-party contractors will clean the stations and complete maintenance work, including upgrades to the tracks, signals, and power systems. More details can be found on SEPTA's website.