Construction and Work Zone Signs
Construction and Work Zone Signs
Work zones change the rules temporarily, and the Guam exam tests orange sign recognition, flagger authority, and temporary speed limits. Work-zone questions often ask what to do when a sign and a flagger disagree.
Core rules
- Orange background with black legend means construction, maintenance, or a work zone. Diamond-shaped orange signs warn; rectangular orange signs may give regulatory instructions.
- Typical sequence: “ROAD WORK AHEAD,” “LANE CLOSED AHEAD,” “FLAGGER AHEAD,” “DETOUR,” and “END ROAD WORK.”
- A flagger’s directions override signs, signals, and pavement markings. Stop when told, and proceed only when signaled.
- Temporary speed limit signs in work zones are enforceable when posted. Fines may be doubled when workers are present if a plaque says so.
- Channelizing devices - cones, drums, and barricades - define the path. Do not cross them.
- Temporary pavement markings may differ from permanent ones; follow the orange devices and signs, not old lane lines.
- Watch for workers, equipment, and reduced shoulders; maintain a safe gap.
Worked example
You enter a work zone and pass an orange “ROAD WORK AHEAD” sign, then “RIGHT LANE CLOSED AHEAD.” A flagger holds a STOP paddle while the temporary signal shows green. You must stop: the flagger’s direction overrides the signal. When the flagger turns the paddle and waves you forward, move into the open lane only after checking that the path is clear. The temporary orange speed sign is enforceable, so the lower number is a legal limit, not advice.
Traps
Do not treat orange as warning yellow; orange specifically marks work zones. Do not ignore a work-zone speed limit because workers are not visible at that moment. Do not follow permanent lane lines through a shifted path. Do not pass a flagger who is holding STOP. “END ROAD WORK” means normal rules resume, not that all hazards have vanished.