The I-676 corridor would be a particularly good place to start. During the decades of planning and construction for the crosstown expressway, dozens of buildings were leveled along Vine Street. But the road ended up being narrower than PennDot had intended, and the city was left with an awkward strip of vacant land along the perimeter. While some parcels were later sold to private owners and turned into parking lots, the absence of habitation has served to accentuate the gulf between Center City and the neighborhoods north of I-676. Putting buildings back on Vine Street would make the journey across that highway canyon feel less daunting and help bind together those severed neighborhoods.