2020 Trolley Tunnel Blitz Starting Friday, July 10 at 10:00 p.m. and CONTINUING THROUGH Monday, July 20, 2020 at 5:00 a.m. SEPTA forces will work around the clock for ten (10) days, tackling critical track and power maintenance and upgrades, station upgrades and painting, tile replacement and maintenance work, and intensive tunnel, track and station cleaning as part of the 2020 Trolley Blitz