PCC #1614 on a fan trip displaying Route 77/54 North Side-Carrick Via Bloomfield signage on Braddock Avenue in East Pittsburgh on Sunday, August 22, 1965

"Flying Fraction" was a nickname given to the 77/54 Route by KDKA-AM radio personality Rege Cordic

Image from a slide by: Tom Buckingham
From the collection of: Archy McNally