Highway Shoulder Breakdown in Extreme Heat
At 14:00 on the Riyadh–Dammam highway the temperature is 48°C. A rider on a 650 cc adventure motorcycle feels the rear tyre go soft and manages to stop on the right-hand shoulder. The bike has hard side cases and a top box. The nearest exit is 7 km back; the next services are 40 km ahead. Traffic passes at about 120 km/h. There is a metal guardrail 2 m to the right of the bike and no shade. The rider has 1.5 L of water, a phone at 30% battery, no reflective vest, and a basic tool kit but no spare tube. The rider is wearing a helmet, gloves, jacket, and boots. The rider feels dizzy and has stopped sweating. The hard shoulder is about 3 m wide.
1. List the immediate actions in the first two minutes, in order, and explain the danger each action addresses.
Read the worked answer
- Stop as far right as the 3 m shoulder allows, hazard lights on, engine off, side stand down. This reduces the chance of a passing vehicle striking the bike or rider.
- Keep helmet and gloves on, but get behind the guardrail if it is safe to do so, facing traffic when moving. This puts steel between the rider and traffic.
- Call emergency services (911) rather than inspect the tyre. Dizziness and stopped sweating are warning signs of heat illness, which can worsen quickly.
- Give the highway number, direction, nearest exit or kilometre marker, and vehicle description.
- Drink water in small sips and stay as cool as possible.
Do not stand between the bike and the traffic lanes; a passing vehicle's draft or a drift can be fatal.
2. The rider wants to push the bike 7 km to the next exit. Evaluate this plan.
Read the worked answer
Reject it. Pushing a 650 cc bike with hard cases 7 km in 48°C, in the hard shoulder, with traffic at 120 km/h and with symptoms of heat illness, is far more dangerous than waiting. The rider could collapse, dehydrate, or be struck while straining near the traffic lane. A 7 km push would take well over an hour even in cool conditions.
The rider should request recovery and move behind the barrier. Only if a safe shaded exit were very close and the rider were symptom-free would walking the bike be worth considering.
3. How should the rider manage heat and communicate the location while waiting?
Read the worked answer
Call 911 or roadside assistance, state the highway and direction, the last exit or kilometre marker, the vehicle colour and type, and that the rider feels dizzy and has stopped sweating. Keep the phone at 30% by making one clear call and sending a location pin.
Stay behind the guardrail. Keep the helmet on until safely behind the barrier; then it can be removed to cool down if the rider is away from the carriageway. Do not pour the whole water supply over the head. Drink small sips and use a little to wet the neck and wrists.