Source: Google maps and 40+ year Tucson resident.
The main roads around the area are Campbell, River, Skyline, First Avenue, and Orange Grove. Street lighting is very dim everywhere in Pima County. There are laws to protect optical astronomy.
Campbell would have been the closest road to exit the neighborhood from but depending on which way you were heading, you could exit on Camino Miraval to Skyline.
The thing is, all of these intersections have traffic cams. I have not been able to find a live or archive link for these cameras though. I'm sure the SO knows every car that went through those intersections in the early morning hours of 2/1