Are you shure it is ir?
A snowy road on a dark night?
The car does not seem to be moving. It may be the photographer's car parked. It is 1959. Little traffic in those days.
Anyway, great shot.
Regards,
Frank
Edit: if you look at other pictures of this bridge, you can see, that the black you see is not the sky, but a mountain with a lot of trees. Can be very dark at night. If you google this bridge, you see more old pictures. There is no traffic and on some you can see parked cars. So my conclusion is a snow on the road and a dark night and the photographer parked his car there. Maybe printed on hard paper.