Exit-Only Lane, Solid Line, and a Semi Alongside
You are driving an unfamiliar rental car northbound on a six-lane freeway at 65 mph. An overhead sign assembly 0.5 mile before your exit shows three downward arrows: the left two lanes continue straight, and the right lane has an 'EXIT ONLY' plaque. The right lane has a white arrow curving right painted on the pavement. A solid white line begins 300 feet before the exit gore. You are in the center lane, and traffic is heavy; a semi is in the right lane beside you. Your navigation says turn right in 0.3 mile. You need to exit. The exit ramp has a posted 25 mph advisory speed. The right lane is also a through lane until the exit? No: the overhead 'EXIT ONLY' sign and the pavement arrow show that the right lane must exit.
1. What do the overhead 'EXIT ONLY' sign and the pavement arrow tell you, and when must you complete the lane change?
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The overhead 'EXIT ONLY' plaque and the curved pavement arrow mean the right lane is dedicated to the exit; traffic in that lane must leave the freeway. If you need the exit, move right before the solid white line and the gore area. At 65 mph you cover about 95 feet per second, so 300 feet is only about 3.2 seconds. With a semi alongside, that is not enough time to guarantee a safe gap. The solid line and gore are not a merge zone; do not cross the gore. If you cannot move right safely before the line, continue and reroute rather than forcing a lane change.
2. The semi is beside you and the solid line is 300 feet ahead. Can you accelerate and cut in front? Explain using speed and distance.
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No. At 65 mph, 300 feet is about 3.2 seconds of travel. To pass a semi that is beside you and then cut into the right lane, you would need a large speed advantage and a safe gap. Even 10 mph faster closes only about 15 feet in 3.2 seconds, which is not enough to clear a tractor-trailer and establish a safe following distance. Cutting in front would force the semi to brake and could cause a crash. The solid white line and exit gore also mark a boundary you should not cross. Missing the exit costs time; a crash costs far more. Continue to the next exit.
3. Suppose you enter the exit ramp and see a 25 mph advisory sign. What does it mean, and how do you set your speed?
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A yellow 25 mph advisory sign is not a regulatory speed limit; it is a recommended maximum for the ramp curve under good conditions. You must still slow to 25 mph or less if conditions require. Begin braking after you enter the deceleration lane, not in the through lanes. The 'EXIT ONLY' sign and pavement arrow are guide and marking cues; the advisory sign is a warning cue. If the ramp is wet, or your vehicle is loaded, go slower than 25 mph. Do not treat the advisory as permission to maintain freeway speed through the curve.