20
Operation
BRIDGE
CLOSED
AHEAD/FOLLOW
DETOUR
HIGHWAY
WORK
CREW
AHEAD
UTILITY
WORK
CREW
AHEAD
ALL
TRAFFIC
FOLLOW
DETOUR
AHEAD
ALL
TRUCKS
FOLLOW
DETOUR
AHEAD
ALL
TRAFFIC
EXIT
AHEAD
RIGHT
LANE
CLOSED
AHEAD
CENTER
LANE
CLOSED
AHEAD
LEFT
LANE
CLOSED
AHEAD
Category 2: Highway Hazard Zone Advisory I
STATIONARY
POLICE
VEHICLE
AHEAD
TRAIN
APPROACHING/AT
CROSSING
LOW
OVERPASS
AHEAD
DRAW
BRIDGE
UP
OBSERVE
BRIDGE
WEIGHT
LIMIT
ROCK
SLIDE
AHEAD
SCHOOL
ZONE
AHEAD
Category 1: Highway Construction Maintenance