Philadelphia trolley (SEPTA)
SEPTA Subway-Surface Trolley · United States of America
betascreening (open data)geometry as of 2026-06-23 · scores as of 2026-07-31
Network
Rolling stock
Kawasaki LRV Series 9000 (111 active of 112 built, used on the T subway-surface lines, former routes 10, 11, 13, 34 and 36), PCC II/III rebuilt streetcars (8 operational of an 18-car fleet on Route 15 / G line, 3 more nearing completion as of May 2026, ongoing restoration under the Trolley Modernization programme). Excludes the Media-Sharon Hill (D) line Kawasaki Series 100 cars, which are a separate light rail line not in scope here. Alstom Citadis low-floor LRVs (130 ordered plus a 30-car option) are due to replace both current fleets from spring 2027 through 2030 but are not yet in service
Data notes
Source: Wikipedia: Kawasaki LRV (accessed 2026-07-04) (+1 more source)
Susceptibility bands (modelled)
Suggest a correction
Spotted a wrong name, a map that looks wrong, an off fleet figure, a missing line, or a hotspot that does not squeal on the ground? Local knowledge beats the model. Corrections feed the next build.
Email a correctionModelled, not measured. Geometric squeal susceptibility before mitigation, computed from open OpenStreetMap centreline geometry; never a noise prediction and not validated against measured sound levels. Fleet figures from public sources.
Bring us your noisiest curve, or problem section.
Show us the curve that will not stop squealing and we will model it with you, then show you what conditioning the interface can do, or if other interventions are required.