I liked the old Boeing-Vertol LRVs. (Light Rail Vehicles).
The shape of the cars lent well to photography.
The San Francisco cars reminded me a the old orange creamsicle frozen treats.
Back in December 1990, I made this view of a Boeing car leaving the Geneva Street car house for a run on the M-Ocean line. I was working with my old Nikkor f4.0 200mm lens on my F3T loaded with Kodachrome 25.
I made great use of that lens, but sold it in 1996 when I bought my 80-200mm zoom. In retrospect, I made better photos with the fixed 200mm.