I'm about to have a similar setup. Dialog in the driving car at night going through the desert. (No streetlight motivation)
My question to you would be, what would you project? It should be a black hole past the window, but I agree it doesn't make it interesting.
If we shoot at night and driving (hostess tray ect) I would attempt this setup - I saw in fargo was some headlight spill past the driver side and passenger side window illuminating some of the roads passing by. This would be for angles looking out those windows.
If we shoot in a studio I would experiment with a hazer and a fan for those shots. A soft backlight on the moving haze might look more interesting.
This is great lighting for frontal shots that I will reference.