The first challenge is the distance you have to shoot to get this shot. I used a 400mm lens with a 2x Extender. Even at 800mm I had to crop it to get the composition I was looking for.
The second challenge was the fact that on an early Sunday morning, within a 2 hour span, only 4 cable cars hit the crest of this hill. Now to get this shot you have to step out into a crosswalk and stand in the middle of a lane of oncoming traffic, which means the green light has to be perfectly timed with the cable car getting to the top of the hill. That doesn't seem to happen very often
All in all I was pretty happy with the results!