In my case, the bridge is four feet wide, and my control panel will be inside, so I really need the two switches.
I was going to build something a bit more exotic with relays, but then I realized that I was probably gilding the lily so to speak. The only downside of this is of someone one side tries to raise the bridge and on the other side tries to lower it, it creates a short. However, in the real world, I don't think that's a major concern. I am planning on putting a PTC or two inside the junction box to address that possibility, but I wanted to get it working.
