The Unmarked Rain-Soaked Junction
It is 7:40 on a wet monsoon morning and you are driving a light truck east on a two-lane road at about 45 km/h. Rain has been falling for an hour; the wipers are on intermittent and the road surface is glossy with standing water near the edges. Ahead is a T-junction with no traffic lights, no stop line, and no painted markings at all - the paint has worn away and the intersection is partly flooded. A motorcycle approaches from the side road on your right, slowing but not stopped, and its rider is looking left toward you. A rickshaw is close behind you. Your braking distance on this surface is roughly double what it would be on dry asphalt. You have about four seconds before you reach the junction mouth.
1. Using the right-of-way rules for an unmarked T-junction, decide what you should do in the next four seconds and justify it.
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At an unmarked T-junction the general rule is that a vehicle on the terminating side road must give way to traffic on the through road, so the motorcycle should yield to me. But right-of-way is not a guarantee - it is a rule I may rely on only when it is safe to do so. The rider is slowing but not stopped, is looking toward me, and may misjudge my speed on a wet surface. I must therefore treat the situation as unresolved rather than assume he will stop.
The correct action is to ease off the accelerator immediately, cover the brake, and reduce speed enough that I can stop within the distance I can see to be clear - not the distance to the junction itself, since a vehicle may emerge beyond it. If the motorcycle keeps rolling, I stop and let it clear. I do not swerve into the oncoming lane to avoid it, and I do not accelerate to 'claim' my priority. Four seconds at 45 km/h is about 50 metres, which is not enough to stop on a wet road from full speed, so the reduction must begin now, not at the junction.
2. The rickshaw behind you is following closely. How does that change your braking plan, and what would you do if you had to stop suddenly?
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A close follower removes my ability to brake progressively, because a hard stop invites a rear-end collision that could push me into the junction. My plan therefore shifts earlier and gentler: I begin slowing well before the junction using engine braking and light, early brake pressure so my brake lights warn the rickshaw driver, and I create a bigger gap ahead of me so I never need maximum braking.
If a sudden stop becomes unavoidable - for example the motorcycle pulls out - I brake firmly and progressively rather than stabbing, keep the wheels rolling so I retain steering, and accept that the rickshaw may close up behind me. I do not release the brake to 'make room' behind, because that would carry me into the hazard ahead. Afterwards I would note the tailgating and, where possible, let the rickshaw pass rather than keep it behind me.
3. Which road-surface and visibility factors in this setup most affect your stopping distance, and how should you adjust your speed and following position?
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Three factors dominate. First, standing water and a glossy surface reduce tyre grip, roughly doubling braking distance, so the speed that was safe when dry is now too fast. Second, worn-away markings and partial flooding mean the junction's geometry is hard to read, so I need more time to identify where vehicles will emerge. Third, rain reduces visibility through the windscreen and mirrors, so hazards appear later than expected.
The adjustment is to cut speed to a level where I can stop within the visible clear distance, roughly halving my dry-road speed in these conditions, and to increase the gap to any vehicle ahead to at least double the normal two-second gap. I should also keep out of the deepest water near the edges where aquaplaning and hidden potholes are likeliest, and use dipped headlights so the motorcycle rider and the rickshaw driver can see me approaching.