Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
This problem exist in the game since day 1 of release and has not been fixed yet. The lights shine through solid objects.
I've also seen this with trailers, especially at night where the brake lights will reflect off the inner walls through the floor.