Construction and Work Zone Signs
Work zone signs and devices move traffic safely through construction and maintenance areas. The exam tests the orange color code, the layout of a temporary traffic control zone, and the authority of flaggers and temporary markings.
Core rules
- Orange signs with black legends mark construction and maintenance areas. They may be fluorescent orange or fluorescent pink in some applications.
- A temporary traffic control zone has four parts: advance warning, transition, activity area, and termination. Signs appear in sequence, and each has a purpose.
- Flaggers use a STOP/SLOW paddle. A flagger's signal has the same authority as a sign or signal; stop when directed and do not proceed until waved through.
- Channelizing devices - cones, drums, barricades, and tubular markers - define the path. Temporary pavement markings override the permanent ones in the work zone.
- Reduced speed limits are enforceable only when posted. Fines often double when workers are present, but the posted limit applies whether or not you see workers.
- Pilot cars and "FOLLOW ME" signs mean follow at a safe distance; do not pass.
Worked example
You enter a work zone with orange "ROAD WORK AHEAD," then "FLAGGER AHEAD," then a flagger holding a STOP paddle. The advance signs told you to expect the flagger, so slow before reaching them. Stop at the paddle, even if the opposing lane looks clear, because the flagger controls the one-lane section. Proceed only when the paddle turns to SLOW or the flagger waves you on.
Traps
- Ignoring temporary markings because permanent lines are still visible.
- Treating orange warning signs as advisory only; work-zone speed limits are regulatory when posted.
- Passing a pilot car.
- Assuming the work zone ends at the last cone rather than at the "END ROAD WORK" sign.