Road Work and Temporary Traffic Control Signs
Work zones rewrite the road with orange signs, cones, and people. The exam tests whether you can follow temporary traffic control and understand Idaho work-zone penalties.
Orange means temporary
- Orange diamond signs warn of road work, lane closures, flaggers, or detours.
- Channelizing devices such as cones, drums, and barricades define the temporary path; drive between them, not over them.
- Temporary pavement markings may replace or conflict with permanent ones; the temporary markings and flagger directions control.
- A flagger's signals override signs and signals: a SLOW paddle means proceed slowly and be ready to stop; a STOP paddle means stop and stay stopped until waved on.
Rules that carry penalties
- Idaho doubles fines for moving violations in work zones when workers are present.
- Slow down and move over for highway workers and equipment, just as for emergency vehicles.
- Do not tailgate through a work zone; sudden stops are common and rear-end crashes are the dominant work-zone crash type.
Worked example
You enter a work zone with a ROAD WORK AHEAD sign, a 45 MPH temporary limit, and a flagger holding a SLOW paddle. The temporary 45 limit replaces the posted 55 for the zone, and the SLOW paddle means continue at a crawl while watching for workers and equipment. It does not mean the zone is clear.
Traps
Resuming normal speed at the last cone instead of at the END ROAD WORK sign; passing a flagger; ignoring temporary markings because the old lines are still visible; assuming no visible workers means no doubled fine.