The town I grew up in, Gisborne New Zealand, had an airport that had a railway line crossing the runway. Perhaps unsurprisingly the trains had to give way to the planes.
https://www.amusingplanet.com/2013/08/gisborne-airport-runwa...
https://www.amusingplanet.com/2013/08/gisborne-airport-runwa...
After all, a plane can easily do a no-fault turn-around and can observe the train in a collision path from up above while the same cannot be said for a train.
???
If you literally mean a conductor, i.e. as per the Wikipedia "a train crew member responsible for operational and safety duties that do not involve actual operation of the train/locomotive" then yes, but then again that's nothing special as local public transport has mostly got rid of conductors for decades already and only a few systems still retain them (like apparently most older North American subway systems). Also it doesn't really have to do anything with how the traffic lights are wired or not.
If on the other hand you do in fact mean a driver, then that would very much surprise me, as automatic operation of light rail systems running in mixed street traffic is still very uncommon to non-existant (as compared to fully segregated subways and subway-like systems, where new systems are commonly automated and older systems are slowly and occasionally being converted to automatic operation), and a cursory search seems to indicate that Minneapolis is no different in that regard, i.e. the trains are in fact still driver-operated.
In Redwood City there's a freight line that runs down the middle of a residential street with zero grade separation or fencing or anything else. You can drive over it if there's no train on it. Unsurprisingly it's a poor neighborhood.