Sharing the Road with Trucks

Learning objectives

After completing this lesson learners should be able to:

• Explain why heavy vehicles need more space and time to manoeuvre
• Recognise areas where truck drivers may have limited visibility
• Understand wide turns and off-tracking
• Explain why trucks require greater stopping distance
• Recognise risks created by staying alongside or immediately behind large vehicles
• Understand wind and air-pressure effects around heavy vehicles
• Position a smaller vehicle more safely around trucks
• Apply predictable and respectful road-sharing behaviour

A truck does not drive like a car

A heavy commercial vehicle is larger, heavier and often longer than a car or motorcycle. Its size affects acceleration, braking, turning, visibility, manoeuvring and lane positioning. A truck driver may need to plan a manoeuvre much earlier than a car driver. What looks like unnecessary movement from a smaller vehicle's perspective may actually be required because of the truck's dimensions.

Why trucks need more space

A heavy vehicle carries significantly more mass. When it needs to slow or stop, the available stopping distance matters. Road conditions, speed, vehicle load, tyres and brakes all affect stopping performance. Do not assume that because the truck is behind you, it can stop as quickly as your car. Give heavy vehicles enough space to react. Avoid cutting immediately in front of a truck after passing it.

Large vehicle visibility

Truck drivers sit higher than many other road users, but that does not mean they can see everywhere around the vehicle. The cab, mirrors, trailer, bodywork and load can create areas where smaller road users are difficult or impossible to see. Motorcycles and bicycles are particularly vulnerable because of their smaller size. Do not assume that because you can see the truck driver, the truck driver can necessarily see you.

The danger of staying alongside

Remaining alongside a truck for an extended period can be risky. The truck may need to change position, encounter a road obstruction, begin a turn, move around another vehicle or have limited awareness of your exact position. If you are travelling beside a large vehicle, avoid staying there unnecessarily. The safest position is one where both road users have a clear understanding of each other's presence.

Wide turns

Large vehicles often need more room to turn. A truck may initially move away from the direction of the turn before completing it. This can look unusual to a driver or rider nearby. Do not attempt to squeeze into the space between a turning truck and the kerb or another road edge. Give the vehicle enough room to complete its manoeuvre. A truck's turning path is not always the same as the path of its front wheels.

Off-tracking

During a turn, the rear wheels of a long vehicle can follow a different path from the front wheels. This is known as off-tracking. It means that an area that appears clear near the front of the vehicle may later be occupied by the trailer or rear section. This is particularly important for motorcycles, cyclists and pedestrians near junctions. Never assume that because the front of the truck has passed, the entire vehicle has cleared your path.

Do not squeeze through

A small gap can look tempting to a motorcycle or small car. But a gap beside a heavy vehicle may disappear quickly. Avoid squeezing between a turning truck and the kerb, a truck and another vehicle, a truck and roadside obstacles, or a truck and a pedestrian area. If the space is uncertain, wait. A few seconds of patience can remove a major risk.

Wind and air effects

Large vehicles can create strong air movement as they travel. This can affect motorcycles, bicycles and lightweight vehicles. The effect may become noticeable when a large vehicle passes in the opposite direction or when a smaller vehicle passes a truck. Maintain control and avoid sudden steering corrections. Give yourself enough lateral space where road conditions allow.

Be careful behind trucks

Following very closely behind a truck can reduce your view of the road ahead. You may not see traffic slowing, road hazards, pedestrians, traffic signals or vehicles entering the road. You also reduce your own reaction margin. Do not use the truck as a shield from wind, rain or traffic. Maintain enough space to see and respond safely.

Trucks may accelerate slowly

A heavy vehicle may take longer to accelerate, particularly when heavily loaded, travelling uphill or starting from a stop. Do not become impatient simply because a truck is slower to build speed. Do not make a risky manoeuvre because you feel the truck is holding up traffic. The road does not owe us a particular speed.

Make your intentions predictable

Safe road sharing depends on predictability. When travelling near heavy vehicles, use indicators correctly, avoid sudden lane changes, maintain a stable position, give the truck time to react and do not deliberately sit in difficult-to-see areas. Remember that the truck driver is managing a much larger vehicle. Predictable behaviour gives both drivers more time to respond.

Share the road, don't compete for it

Heavy vehicles are part of the road system. They transport food, medicines, fuel, construction materials, consumer goods and essential supplies. Their size does not give them priority over other road users. But their size does require other road users to understand their operating limitations. The safest approach is cooperation: give space, stay visible, be predictable and be patient.

Real-world scenarios