Temporary Red Signal in an Unstaffed Night Work Zone
You are driving a 26-foot box truck on US-93 north of Missoula at 11 p.m. An orange sign reads ROAD WORK AHEAD; then LANE CLOSED AHEAD; then a temporary traffic signal showing a steady red. No workers, flaggers, or equipment are visible. The normal speed limit is 65 mph, but an orange speed-limit sign reads 45 MPH. A white sign below it reads WORK ZONE. The road is wet, and the lane closure tapers into the oncoming lane. A line of three cars is stopped ahead of you at the signal. After about two minutes, the signal remains red, and one driver ahead edges forward, then stops. Your passenger says the signal must be broken because no workers are present, and suggests proceeding slowly around the taper. The opposite lane appears empty for at least a quarter mile.
1. Does the absence of workers mean the 45 MPH work-zone speed limit and the temporary red signal are not enforceable?
Read the worked answer
No. The orange 45-mph sign is a posted regulatory speed limit for the work zone, and the temporary signal is a traffic control device. Neither is cancelled simply because you cannot see workers at 11 p.m. Work-zone signs and signals are often left in place overnight or between shifts because the hazard, lane shift, or narrowed alignment remains. Unless the speed sign says something like WHEN WORKERS PRESENT or has been covered, treat 45 mph as the limit. The red signal requires a stop. The empty opposite lane does not convert a red signal into a yield sign. Obey the posted controls and wait for a lawful indication to proceed.
2. How should you respond to the passenger and to the driver ahead who edges forward?
Read the worked answer
Do not follow the other driver's example. Another driver's impatience does not make the movement legal, and the driver ahead may be creeping forward to improve visibility rather than committing to the intersection. Keep your box truck fully behind the stop line or signal, maintain space from the car ahead, and watch for a flagger, pilot car, or signal change. The wet road and the lane taper into the oncoming lane make a wrong-side movement especially risky. If the passenger keeps pressing, explain that the red signal controls the lane closure and that proceeding would put you head-on against traffic that may appear from beyond the taper.
3. If the red remains for an unusually long time and no flagger appears, what is a reasonable next step?
Read the worked answer
First confirm whether the signal is actually malfunctioning: watch for a full cycle, look for a flagger or pilot car, check whether opposing traffic is being released, and look for any instructions posted at the signal. Two minutes and one impatient driver are not enough to conclude the signal has failed. If it is clearly failed and no one is controlling the site, you may proceed only after stopping, yielding to all traffic, and ensuring the movement is safe under the rules for a failed signal. In this setting, entering the oncoming lane against a red at night on wet pavement is high risk; waiting for a pilot car or flagger is usually safer than improvising.