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It should be noted that despite of low reaction times for the Tri-light system, it could
not be considered a practical alternative because the tricolor-equipped vehicles would
create confusions in trafc situations involving presence of many lead vehicles. The
problem was somewhat solved by incorporation of the center high-mounted stop lamp
(CHMSL), and it is covered in the next section.
c. Analysis of accident data
Rear-end accident data have been analyzed to determine if the rear-end accident rates
are affected by rear signal lamp characteristics such as the separation of tail lamps from
stop lamps, i