Night Work Zone With No Workers Present
At 10:30 p.m. on a dry night, you are northbound on a state route with a normal speed limit of 55 mph. Orange ROAD WORK AHEAD signs appear. A portable black-on-white SPEED LIMIT 45 sign is posted, with no supplemental plaque. Barrels and temporary yellow lane lines shift traffic about two feet to the right; the old white edge line is still visible. A paving machine and roller are parked on the shoulder, and no workers are in the roadway. You are traveling 55 mph. The car ahead slows to about 45 mph. Headlights from a truck behind you are close. A flagger’s sign is covered; no flagger is present. The lane shift begins in about 200 feet. You have not slowed.
1. Is the 45 mph work-zone speed limit enforceable when no workers are present?
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Yes. The black-on-white SPEED LIMIT 45 sign is a regulatory sign, and the orange signs and barrels establish the work zone. A reduced work-zone limit is enforceable even when no workers are in the roadway, unless the sign itself says something like WHEN WORKERS PRESENT. Nothing on this sign limits it that way.
The parked paving machine and the lane shift are still hazards, and the temporary alignment reduces clearances. At 55 mph you are 10 mph over the posted limit and approaching a shift with a close truck behind. Slow smoothly before the barrels, not after you are already in the taper.
2. Does Michigan double fines here?
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Not necessarily. Michigan’s enhanced work-zone penalties apply when workers are present in the work zone. Here no workers are in the roadway, so the fine may be treated as a normal speeding fine rather than a doubled one.
That does not make 55 legal: the 45 mph limit still applies, and the officer can cite you for exceeding it. If workers return-or if the sign includes a workers-present plaque-the higher penalty can apply. Do not use the absence of workers as a reason to ignore the posted limit.
3. Which lane markings control, and what should you do about the truck behind?
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Follow the temporary yellow lines and the barrels; they control over the old white edge line, which may no longer show the true travel path. Do not straddle lanes or drift back to the old line.
Because the truck behind is close, signal early and brake gradually so it can react, but do not maintain 55 to avoid slowing it. Keep a steady speed at or below 45 through the shift and let the truck pass only when a safe opportunity appears. A tailgater does not change the posted limit or the work-zone alignment.