Re: A puzzle for you ?
  Len

I’m not very technically-minded – but as I recall words of wisdom from the late Alf Twentyman (cable tram preserver extra-ordinaire), at the intersections of two cable tram lines at, say, Swanston and Collins Streets one street’s cables were conducted by pulleys under the cables in the cross street. Drivers along one street were required to cross the intersection with the cable released. In other words, to coast across the intersection. The drivers in the other street could “power” across the intersection gripping the cable.

Would that have been the case?

Len