I got a tour of the Burnside Bridge in Portland twice when I was in probably middle school, a couple years apart. The first time, the operator had a big panel o

I got a tour of the Burnside Bridge in Portland twice when I was in probably middle school, a couple years apart. The first time, the operator had a big panel of giant switches and buttons with a relay interlock system to make sure things proceeded in the right order. The second time, the control system had been replaced by a single color LCD touchscreen with what I can only describe as the bridge opening wizard... complete with a "Next >" button.