Subways and Trolleys in the Same Tunnel?? Philly’s Market-Frankford Line & Subway-Surface Trolleys

We're riding one more line of the Philadelphia subway... or should I say, two more lines? The Market-Frankford Line, which opened in 1907, links the Frankford Transit Center with the 69th St Transit Center. In Center City, between 13th St and 30th St, the MFL shares its tunnel with five different trolley lines. These are collectively known as the Subway-Surface Trolleys. The Trolleys run local along this shared section, using the outer tracks and a balloon loop under the City Hall at 13th St, while the MFL trains run express between 15th and 30th St stations on the inner tracks. The easiest transfer is at 13th St, but today we'll show you how to transfer between the two lines at 15th St station. Not an easy task to do!
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