The rain should be falling in streaks, obscuring the view of the road.
The people walking on the road should be soaked to the bone, their clothes clinging to their bodies.
The Jaguar XK140 car should be splattered with mud, and its headlights should be reflecting off the wet road.
The air should be cold and damp, and the fog should be so thick that it's difficult to see more than a few feet in front of you.