Faded stop line at a blind T-junction
At 5:50 p.m., Sopheak is riding a 125 cc motorcycle north on a red-earth farm road in Takeo, carrying a friend as pillion. He approaches a T-junction with National Road 33. A stop sign stands on the right, but a sugarcane load has pushed it to a 20-degree lean and foliage hides part of the red octagon. The stop line is worn to faint white patches. Sopheak wants to turn right onto the highway. A loaded truck is approaching from the left at about 60 km/h, roughly 150 metres away, with no indicator showing. The sun is low behind Sopheak, the highway surface is dry, and his front tyre is slightly underinflated. Sopheak has crossed this junction many times and usually rolls through when no car is close. He estimates he can accelerate to highway speed in about five seconds and asks whether the truck's distance is enough.
1. What does the stop sign and the worn stop line legally require, and does the sign's condition change that duty?
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Legal duty: A STOP sign requires a complete stop at the stop line, or at the edge of the carriageway if the line is missing. The rider must then give way to traffic on the priority road. The sign's lean and the worn line do not suspend the duty; if a sign is obscured, a rider who knows the junction should apply the stricter interpretation, not the looser one.
Why it matters: The sign is there because the farm road has poor sight lines. Rolling through transfers the entire risk to the highway driver, who may have no reason to expect a motorcycle entering from the right. 'I stopped yesterday' and 'no car was close' are not legal or safe tests.
Practical rule: Treat an obscured or damaged stop sign as a full stop sign until the junction is clear, and report the damage to the commune or road authority if possible.
2. Using the distances and speeds given, judge whether Sopheak has a safe gap. Show your reasoning rather than just saying yes or no.
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The arithmetic: 150 m at 60 km/h is about 9 seconds' travel time. That sounds generous until the rider's task is broken down: stop, look left, right and left again, select first gear, check the pillion, release the brake and accelerate a loaded 125 cc bike through a gravelly junction. That easily consumes 3–4 seconds, and the truck may be closer than it looks if its speed is higher than 60 km/h.
Hidden margins: The truck driver may not see a small motorcycle against the low sun. The underinflated front tyre and loose surface lengthen acceleration and braking. A pillion shifts weight and makes the turn less precise. The rider also needs a margin for the truck's own braking distance.
Conclusion: A 9-second gap is not enough. He should stop, wait for the truck to pass or for a clearly larger gap, and then turn without rushing. A few seconds of patience is cheaper than a T-junction collision.
3. What observation and positioning plan should Sopheak use before and during the turn?
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Observation plan: Stop at the line, not in the highway. Look left, right, then left again; use mirrors only as a supplement because they distort distance. Listen for vehicles hidden by the cane. Signal early, but do not assume the signal gives priority.
Position and gear: Keep the bike upright on the loose red earth, select first gear before moving, and avoid a wide swing into the far lane. Turn into the near lane and straighten before accelerating hard.
After the turn: Check the pillion's balance, then accelerate progressively. If the front tyre feels vague, reduce speed and check pressure at the next fuel stop. The correct judgement at this junction is to separate the stop, the observation and the turn into three distinct actions rather than combining them into one rolling movement.