It's great to see some plans are being made for this extremely important corridor. It's lined with planning failures. It can't be discussed too much because decisions are happening now for it's future. The most important aspect of these new proposals is how they address Columbus Blvd/Delaware Ave.
Delaware Valley Regional Planning Commission
https://www.dvrpc.org/Reports/16046.pdf
I think they might consider this as another option. It's like a tram with out rails.
Autonomous Rail Rapid Transit, or ART
https://www.curbed.com/2017/11/6/166...a-art-rail-bus
Chinese Rail-Bus 2
Chinese Rail-Bus
https://www.youtube.com/watch?v=bXB87NWHvDg