How about using laser diodes for the tail lights? I've been meaning to
post this idea for a few months now, but it seems that big trucks
(semi's), Ryder rental trucks, and county busses have the red laser diodes
as the brake light function. Also, some stoplights use them (throughtout
all of CA - not in Idaho yet thouhg!)

Just an idea.  One of the electronics folks out there can rig up some
boiler plate model to test :-)
-M

Matthew Pollard             http://www.uidaho.edu/~poll7356
Dept. of Chemistry               http://www.chem.uidaho.edu
University of Idaho                   http://www.uidaho.edu