The structure was built in 1898 to cross the Reading Company’s rail tracks. Those tracks are long abandoned and with buildings fronting Broad Street on either side, the bridge today is invisible to the unknowing eye. 

Now, due to severe decay, the bridge needs to be replaced. That means the Callowhill to Noble portion of Broad Street will be impacted. In addition to affecting vehicular traffic, the project has implications for groups looking to reuse the area under and around the bridge for a linear park or bus rapid transit line. 

(via PlanPhilly | PennDOT to rebuild hidden Broad Street bridge)