Nighttime Work Zone Speed Limit and Arrow Board
At 11:20 p.m. you are northbound on a six-lane urban freeway posted 65 mph, approaching a nighttime lane closure at mile 142. A trailer-mounted arrow board displays a diagonal arrow pointing left. Orange signs read RIGHT LANE CLOSED 1,000 FT, then WORK ZONE; a temporary white speed limit sign shows 45 with an orange WORK ZONE plaque. No workers are visible; the crew and equipment sit behind a concrete barrier on the shoulder, and no flagger is present. You are in the center lane at 68 mph, and a box truck is tailgating about one second behind you. About 800 feet past the merge, an orange sign reads END ROAD WORK. The right lane remains coned off for another half mile.
1. At 11:20 p.m., with no workers visible, is the 45 mph limit enforceable? Explain what difference worker presence makes.
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Yes, the 45 mph limit is enforceable as posted. A temporary speed limit sign in an active work zone is a regulatory sign; it does not depend on whether you can see workers at that moment, and 11:20 p.m. does not suspend it. What worker presence typically changes is the penalty: Florida imposes enhanced fines and points in work zones when workers are present, and signs often say so. If the sign or plaque said WHEN WORKERS PRESENT or WHEN FLASHING, the limit would be conditional; here the plaque reads WORK ZONE, so the 45 applies while the zone is active. At 68 mph you are 23 over. The tailgater is not a defense and not a reason to brake-check. Slow early, signal, and merge smoothly; if the truck will not back off, let it pass rather than escalating.
2. What exactly is the arrow board telling you, and how should you merge given the tailgater?
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The arrow board is a warning device, not a command to change lanes immediately. A diagonal arrow pointing left means the lane to the right is closed ahead and traffic must move left; the arrow indicates the direction of the merge. It does not mean pass on the left, and it does not override the posted speed limit. With a tailgater one second back, avoid a hard brake: signal early, reduce speed gradually, and merge when a gap opens. If the truck is too close to merge safely, maintain your lane until you can move over without conflict, and do not use the shoulder to pass. Once merged, keep left and leave the closed lane empty. The END ROAD WORK sign later means the work zone restrictions end there, not that the coned-off lane is suddenly open.
3. If a flagger appears farther ahead holding a paddle that reads SLOW, what does that require, and how does it differ from a STOP paddle?
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SLOW paddle: proceed with caution at a reduced speed, stay alert, and be ready to stop; the flagger is telling you a hazard is ahead but you may continue. STOP paddle: stop and remain stopped until the flagger signals you to proceed. A flagger's directions override signs and signals, so follow the paddle even if the light or sign says otherwise. Do not interpret a SLOW paddle as permission to maintain 45 mph; it usually means the work area is active, equipment may move, or the lane is narrow. If the flagger is not visible or you are unsure what is being signaled, slow further and prepare to stop rather than proceeding on assumption.