Monsoon Spray and a Light Steering Wheel
At 18:30 during heavy monsoon rain you are driving a five-year-old saloon on a two-lane road outside Yangon. Your speed is 60 km/h. The tyres have about 2 mm of tread left. You are following a steel-bodied truck at roughly 15 metres; it has no mudflaps and throws up dense spray. Water is standing in the wheel ruts, and the steering has just begun to feel light. On the left shoulder two pedestrians walk with umbrellas, one partly in your lane. Ahead, a stalled car sits on the shoulder with no lights and a man standing behind it. Visibility is about 80 metres and dropping. Your wipers are on full speed but are smearing. The road has no street lighting.
1. Identify the three most important hazards and explain why the combination is dangerous.
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The first hazard is the truck: at 15 metres it gives you almost no stopping distance and its spray hides the road ahead and any brake lights. The second is standing water combined with 2 mm tyre tread: shallow tread clears water poorly, so at 60 km/h the tyres can lift off the surface and cause aquaplaning; the light steering is an early warning. The third is the vulnerable road users and the stalled car: the pedestrians are partly in your lane and the unlit car has a person standing behind it, both appearing late through smeared glass. These hazards interact: the spray reduces your view, the water reduces grip, and the truck limits your escape space. Slowing down addresses all three at once.
2. What speed and following distance would you choose, and how would you use lights?
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Reduce speed well below 60 km/h, to a level where you can stop within the distance you can actually see, and increase the gap to at least four seconds, preferably more behind a spray-generating truck. In practice that means dropping back until you can see past the truck and have room to stop if it brakes suddenly. Use dipped headlights so others see you; do not use high beam, which reflects off rain and spray. Use the demister to keep the screen clear and replace worn wiper blades when possible. If you must stop, pull well off the road and use hazard lights only while stationary; do not switch them on while moving as a substitute for correct speed and spacing.
3. The steering goes light and the wheel pulls slightly. What do you do and what must you avoid?
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Ease off the accelerator and hold the wheel firmly but gently. Do not brake hard or steer sharply, because sudden inputs can break what little grip remains and start a skid. Keep the car straight, look far ahead rather than at the truck, and wait for the tyres to regain contact. If you need to slow, use gentle progressive braking after the steering feels normal again. Avoid cruise control in these conditions, avoid overtaking through the spray, and do not follow the truck closely to use its lights as a guide. Once safe, pull over and check the tyres; 2 mm tread is not adequate for sustained heavy rain.