CHMSL
In DOT-speak, that stands for Center High-Mounted Stop Light, ie the 3rd brake light. Has anyone added one to the back of their camper? As far as I know there are no laws requiring one, but the safety data says it's probably a good idea.
Forum Discussion
- My TC has double set of taillights.
So my concern would be rather blinding the guy behind with my stop lights, than having him not seeing the discotheque . - I have never seen a box truck or enclosed trailers with one . It might interfere with the 3 center marker lights . Usually the brake lights on a camper or truck are higher than cars with 3rd brake light . Interesting
- DOT probably gonna' go with the FMVSS 571 vehicle safety regs .
Check out FMVSS 571.108 S14.9.3.11.12.2 then just below in table 1-A and in next table 1-b and 1-c it talks about stop light locations.
2 Red....
On the rear, at the same height, symmetrically about the vertical centerline, as far apart as practicable....
Not less than 15 inches, nor more than 72 inches.
I didn't search too hard for a aux single center mounted brake light.
I would drop by your local state troop hdqtrs and ask that question to a certified size and weights officer.
