Work Zone With Flagger, Lane Shift, and Wet Pavement
On a rainy Friday at 4:40 p.m., you are driving alone on a four-lane DC arterial road. Ahead, orange construction signs read 'ROAD WORK AHEAD,' 'LANE SHIFT RIGHT,' and 'SPEED LIMIT 25.' The normal limit is 35 mph. Cones taper your left lane into the right lane, and a flagger holding a 'SLOW' paddle stands near the merge point. A dump truck is backing slowly out of a site on the left, and a worker in a hard hat is walking near the cones. Your lane is moving at 30 mph, and the driver behind you is close. You need to merge before the cones, but a car in the right lane is alongside your rear bumper. Rain is steady, wipers are on, and the pavement is wet.
1. Which signs control your speed and lane position, and how should you respond to the flagger?
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The orange 'ROAD WORK AHEAD' and 'LANE SHIFT RIGHT' signs warn you what is coming, but the temporary 'SPEED LIMIT 25' sign is regulatory: 25 mph is the maximum, not a target. You are already at 30 mph, so ease off before the taper and merge right in a planned way. The flagger's 'SLOW' paddle is an instruction to slow or stop as needed; flaggers control traffic in the work zone, so follow the paddle even if it seems to conflict with your expectation. Do not pass the flagger or the cones. In rain, reduce below 25 if the workers, truck, or wet pavement make it necessary.
2. The car in the right lane is alongside your rear bumper and the driver behind is tailgating. How do you merge safely without a sudden brake or swerve?
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Signal early and avoid a sudden swerve or hard brake. Since the right-lane car is alongside your rear quarter, do not force a merge into it; either accelerate enough to get ahead with a safe gap or ease off and merge behind it. The tailgater is a reason to brake smoothly and early, not to jam on the brakes. If the lane ends before a gap opens, continue at a controlled speed and merge only when clear; do not stop in the live lane unless the flagger directs you. A missed gap is safer than a sideswipe.
3. What hazards should you scan for near the cones, and why is 25 mph still potentially too fast in rain?
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Scan the cone taper, the backing dump truck, the worker near the cones, the flagger, and the wet pavement. A backing truck may not see you, and a worker may step into the lane. At 25 mph in rain, stopping distance is longer and visibility is reduced; 25 is a ceiling, not a safe speed for every moment. Cover the brake, increase following distance, and be ready to stop for the flagger or worker. If the truck's path is unclear, slow early and wait rather than trying to squeeze past.