No. There is a thing called a "conflict monitor." It uses a hard wired control board. This board has solderable links on it. When you connect a link you're

No. There is a thing called a "conflict monitor." It uses a hard wired control board. This board has solderable links on it. When you connect a link you're describing two phases which CANNOT be green at the same time. You then slide the board into the monitor. If the monitor sees that current for the green lights on two opposing phases are green at the same time, or any of several other fault conditions, it will trip, then "throw the intersection into flash" as a roadway protection mechanism. At this point none of the controllers or other logic is capable of controlling the intersection and it stays in flash until someone comes and manually resets it. Here's an example of what one of those cards looks like. Wonderfully old school and absolutely nothing active about it. https://i.ebayimg.com/images/g/9roAAOSwKOFfh3gM/s-l1600.jpg https://i.ebayimg.com/images/g/9roAAOSwKOFfh3gM/s-l1600.jpg