Reading Unfamiliar Markings and Flashing Signals on a Wet Rural Road
Ayumi drives a 準中型 truck on an unfamiliar 片側1車線 prefectural road at dusk in steady rain. Ahead, the centre line changes character three times: a white broken line on the open straight, a solid white line through the approach to a blind curve, and a solid yellow line on the straight beyond it. At a T-junction, a painted zebra area (導流帯) separates the mouth of the junction from the through lane, and two white diamond marks are painted in her lane shortly before a pedestrian crossing. At the next intersection her signal shows flashing yellow while the cross road shows flashing red. Ahead of her, an oncoming bus has its right indicator on and is beginning to move. Ayumi is running eight minutes late, the road behind her is clear, and a farm tractor is crawling at about 20 km/h in her lane.
1. Explain what each of the three centre-line types permits or forbids, and state whether she may overtake the tractor on the yellow-line section.
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- White broken line (白の破線): crossing it is permitted, so overtaking is allowed if sight distance, oncoming traffic and the 追越し禁止場所 rules all permit.
- Solid white line (白の実線): crossing it is prohibited, so no overtaking and no straddling - this is why it is used into the blind curve.
- Solid yellow line (黄の実線): overtaking is prohibited, but crossing the line itself is not prohibited for purposes such as turning right into a side road.
On the yellow-line straight she may not overtake the tractor. The temptation is real - 20 km/h, empty road behind - but neither the line nor the two-minute saving changes the rule. The correct action is to hold back at a distance that keeps the tractor's mirrors and her own stopping distance in view, and wait for a section where the line becomes broken and the sight line is clear. Rain and dusk further raise the standard for "safe".
2. What do the 導流帯 and the white diamond marks require of her?
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導流帯 (zebra-painted area at the junction mouth): this is part of the roadway not provided for vehicle traffic. She must not drive on it, cut across it, or use it to swing wide into or out of the side road. Its purpose is to keep turning vehicles on a predictable path and to protect the junction's sight lines - crossing it puts her exactly where another driver will not be looking.
Diamond marks (菱形): a warning that a pedestrian crossing lies ahead. They exist because the crossing itself may be hidden by the curve, the rain or the dip in the road. The required response is to reduce speed now, search both kerbs and the far side of the crossing, and be ready to stop for anyone waiting or about to step out - not to wait until the stripes appear.
The linking idea for both is anticipation: the markings are telling her to change her speed and her line before she can see why.
3. Her signal is flashing yellow and the cross road's is flashing red. How should she proceed, and how does the oncoming bus with its right indicator change her plan?
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Flashing yellow: proceed with caution - the signal does not give her priority, it removes the light's control. She must slow enough to stop if the way is not clear, watch for vehicles and pedestrians already in the junction, and be ready for someone on the cross road to get it wrong.
Flashing red (cross road): those drivers must stop at the stop line and confirm safety before moving. She may rely on that only in principle, not in practice: flashing signals are used at low-volume junctions precisely where compliance and attention are weakest.
The bus: an oncoming vehicle showing its right indicator intends to turn across her path. As a 直進 vehicle she has priority, but a large vehicle turning across a wet junction can block her lane for several seconds. The judgement is to ease off early, judge whether the bus will actually clear, and be prepared to stop rather than to assert the right of way into a closing gap.