Stop Sign Study
Stop signs are used at intersections to separate potentially
conflicting traffic movements and thus prevent crashes.
Drivers who fail to stop or, after stopping, proceed with
insufficient caution create a substantial crash risk.
The purpose of this study was to evaluate strategies to
improve motorist compliance and caution at stop signs.
The primary device used in this study was a light-emitting
diode (LED) sign that featured animated eyes scanning
left and right to prompt drivers to look left and right
for approaching traffic. The introduction of the animated
LED eyes at three stop sign-controlled intersections was
associated with significant increases in the percentage
of vehicles coming to a complete stop and a small increase
in the percentage of drivers looking right before entering
the intersections. Right-angle conflicts also were reduced.
The animated eyes display could also be used with symbol
icons showing when vehicles are approaching in a direction
with poor sight distance.