Of course that example was hugely complicated by having trackless trolley overhead cutting through the crossing frog area. For those of you not familiar with the area, Duboce (east-west) serves as the exit from the Market Street subway. Church Street (north-south) is where the J Muni line heads south, using pantograph equipped LRVs, and also has a TT line. A couple of blocks south Church crosses Market, where dual-use (pole trolley and TT) crosses with the F line, which uses historic pole-equipped cars, mostly PCCs, running on the positive wire shares with TTs (so no pan use there, hence no gliders on the connecting track between Church and Market). The F lines pull-in/out route to the San Jose barn is via Church, so the entire Church line is usable for poles and pans. The frogs for poles at Church and Duboce are for access to the Duboce yard, used by the Market Street Railway for historic car storage at one time.
Boston has one pole-only line, the Mattapan line, which uses PCCs on private ROW. Boston did have a lot of pole-equipped work equipment until fairly recently, and may still have some. The T has been known to borrow work equipment back from museums in the past.