I believe it is with one exception. The only other change that was made (I think) was making the 500k ohm pot a 10k ohm pot per GRJ's later suggestions. I fiddles with that a little more and came up with the 10k ohm pot being a smaller range that is probably all that would be needed. The 500k ohm pot will work, it is just a bit larger range than is actually needed as GRJ pointed out. It was also all I had at the time. I will post the revised schematic here.
I believe the traffic signal schematic is correct with stan2004's suggestion of the opto- coupler relay added. I will post my current schematic of that one also just in case. Since Stan's post and the schematic revision I ordered some of the opto-couplers, but I have not tried them with this circuit and crossing gates yet.
