The issue with any traffic engineer, is that there's actually no science supporting traffic engineering. It's voodoo. And if you say that to anyone who deals with traffic, they act like you dessicated their shrine. Sure, some individual parts have science (traffic flow). But when proven false (California flows better than stated, other places worse) they will persist on using the proven wrong models, rather than trying to solve for reality.
A human factors study into lights, and having the colors/flashing change to help improve flow/compliance isn't what they do. "Fuck you, red lights are read and solid" is the closest to a discussion they will have with you.