Here are two pictures of a PCC street car stopped next to a suburban station on the layout. Corgi advertises their PCC cars as 1/50th scale. The station is an HO model, but it has large dimensions for a 1/87 model, it looks correct on the S scale layout. The black car in the second picture is 1/64, the people are 1/64. I find that there is some flexibility in the exact scale of details even in a scale environment.
In the arcane details department the track gauge is incorrect for a Pittsburgh street car. The gauge is a scale 6” too narrow. Pittsburgh Railways used 5’-2 1/2” gauge for the streetcar system.