When Verizon was C&P Telephone here in the Mid-Atlantic, many of their cars were retrofitted with 3rd brake lights. They had a lot fewer rear-end accidents and their experience was one of those used to promote the regulations. They did this back in the 70's and 80's.
i read somewhere that the evidence that 3rd brake lights reduce accidents does not exist. it was a novelty factor. in other words, seeing the 3rd brake light did reduce accidents when it was new and unusual, but now that it is commonplace it has no noticeable effect.
also, read something about amber tailights having an effect at reducing accidents..
