Five Signs, One Rainy Junction
At 6:40 p.m. on a rainy October evening, you are southbound on Arkansas Highway 5 near a rural Y junction with Highway 9. Your speed is 45 mph, the posted limit. Four signs are visible through intermittent wipers: a yellow diamond showing a side-road symbol, a white rectangle reading SPEED LIMIT 45, an orange diamond reading ROAD WORK AHEAD, and a green rectangle reading Highway 9 North with a left-pointing arrow. A red octagon on the left approach has faded lettering, but its shape is clear; a low branch hides part of its face. You want to turn left onto Highway 9. A pickup behind you is closing fast.
1. Classify each of the five signs by shape and color. Which create a legal duty you must obey, and which are only warning or information? Explain how you decide.
Read the worked answer
The red octagon is a STOP sign and is regulatory: the octagon shape is reserved for stop, so even faded lettering does not change the duty to stop. The white rectangle with black lettering is a regulatory speed-limit sign, so 45 mph is the enforceable limit absent a separate work-zone limit. The yellow diamond is a warning sign: it tells you to expect a side road and to adjust speed, but it does not itself command a turn or a stop. The orange diamond is a work-zone warning; it signals changed conditions ahead but is not a legal speed limit unless paired with a regulatory plaque. The green rectangle is a guide sign: it gives route and direction information, not a command. I decide by shape family first, color second, and legend third, because shape and color remain readable when words are obscured.
2. The stop sign’s legend is partly hidden by the branch, and you cannot read the word STOP. Must you stop? What if the sign face were completely covered?
Read the worked answer
Yes. A visible red octagon is enough to identify a stop sign; the unique shape is the primary cue, and faded or partly hidden letters do not erase the requirement. You must stop at the limit line, crosswalk, or edge of the intersecting roadway, then proceed only when safe. If the sign face were completely covered so that no stop sign was visible, you would not have a visible sign command at that approach, but you would still owe a duty of care at a Y junction with limited sight distance. In that case, slow, look for pavement markings or a stop bar, and yield rather than assume you have the right-of-way. The closing pickup is a reason to signal early and brake gradually, not a reason to roll through.
3. How should the green guide sign and the fast-closing pickup affect your lane position and turn onto Highway 9?
Read the worked answer
The green sign tells you that Highway 9 North is to the left, so you should begin positioning for a left turn after checking your mirror and blind spot. Signal early and smoothly, because the pickup is closing fast and a sudden brake or swerve could cause a rear-end crash. If there is no dedicated turn lane, move near the centerline only when oncoming traffic is clear, and keep your wheels straight while waiting so a rear impact does not push you into opposing lanes. Do not let the guide sign override the stop sign or the warning diamond. The guide sign chooses your route; the red octagon controls your obligation to stop; the yellow diamond tells you to expect the side road.