  Montgomery County Police Department in Maryland hosted a cannabis
intoxication impaired driving lab, to evaluate the driving behavior of medical
marijuana users, pre and post cannabis consumption. A portable driving
simulator with an eye-tracking device was used where ten participants drove a
virtual network in two different events: a traffic light changing from green to
yellow and the sudden appearance of a jaywalking pedestrian. An accelerated
failure time (AFT) model was used to calculate the speed reduction times in
both scenarios. The results showed that the participant speed reduction times
are lower i.e., they brake harder post cannabis consumption, when they
encounter a change in traffic light whereas there is no statistical difference
in speed reduction times pre and post cannabis consumption, when they encounter
a jaywalking pedestrian. The gaze analysis finds no significant difference in
eye gaze pre and post cannabis consumption in both events.

Methodology