Single-Lane Bridge at Dusk
At dusk on the Chakwal–Talagang road, you are riding a motorcycle at 50 km/h. Ahead, the two-lane road narrows to a single-lane bridge about 40 metres long. A loaded truck has already entered the bridge from the opposite direction and is 15 metres onto it, moving slowly. On your left, 20 metres before the bridge, a tractor with an empty trailer waits at a dirt track. There are no streetlights, the dust is still settling, and the truck’s headlights are on high beam. Your lane is clear behind you, but a car is approaching fast about 80 metres back. The bridge has no priority sign and no markings. You need to decide whether to enter, how to deal with the tractor, and where to position your motorcycle so that you are not trapped.
1. Who has the right of way at the bridge, and what should you do first?
Read the worked answer
The truck already on the bridge has the right of way. On a narrow bridge, a vehicle that has already committed to the crossing should be allowed to clear it; entering from the other end would create a head-on trap with no room to pass.
Your first actions are to reduce speed and prepare to stop before the bridge entrance:
- Check the mirror and brake progressively so the fast car behind sees your brake light early.
- Stop at a point that leaves the bridge mouth clear, not halfway onto the bridge.
- Avoid staring at the truck’s high beam; look toward the left edge of your lane to keep your position.
- Do not enter even if you think you can squeeze past. The truck may straddle the centre, and the dust reduces your view of its trailer.
The correct judgement is to wait for the truck to clear, not to assert priority because you are on the main road.
2. What should you do about the tractor waiting on your left?
Read the worked answer
The tractor is emerging from a dirt track and should yield to traffic on the main road, but you should not rely on that. Do not wave it onto the bridge while the truck is still crossing; that would create a second vehicle in the narrow section and block your own escape.
- Keep your motorcycle in a visible position before the bridge, but do not move so far left that you block the tractor’s track or get hit if the trailer swings.
- Watch the tractor’s front wheels and the driver’s hands; a loaded trailer can move before the tractor appears to.
- If the tractor edges forward, stop and let it wait rather than competing for the bridge mouth.
- After the truck clears, proceed only when the bridge is empty. If the tractor enters first, yield rather than ride beside the trailer.
Defensive riding here means treating the tractor as an unpredictable hazard, not as a vehicle that must automatically give way.
3. How should you manage the car behind and your lighting while waiting?
Read the worked answer
The car 80 metres back is closing fast, so your stop must be communicated early. Tap the brake pedal or lever to flash the brake light before you need to stop hard, and slow gradually rather than braking suddenly at the bridge entrance.
- Keep your dipped headlight on so the car and the truck can see you; do not retaliate with high beam.
- Position the motorcycle slightly left of the lane centre but still clear of the tractor’s path, so you are not directly in the car’s line if it fails to stop.
- Leave enough space to pull forward onto the bridge if the car behind cannot stop, but only if the truck has cleared that space.
- Avoid stopping in the dust cloud where you are least visible.
After the truck clears, move off smoothly and check the mirror again before entering the bridge.