Understanding Truck Blind Spots: Safer Roads for Everyone
A driver can sit metres above the road, surrounded by mirrors, cameras and sensors, yet still be unable to see someone standing right next to the truck. Understanding truck blind spots helps everyone stay safer.
There’s someone in the mirrors! Scania combines traditional mirror visibility with electronic warnings to help drivers keep track of vulnerable road users.
Key Points
- Trucks have blind spots immediately ahead, behind and along both sides of the vehicle.
- The passenger side is particularly hazardous, especially when a truck turns left.
- Never attempt to pass a truckon the inside while it is turning.
- Overtake decisively and legally, then leave adequate space before moving back in.
- Cyclists, motorcyclists and pedestrians should never assume the driver has seen them.
- Scania’s driver-assistance systems can provide warnings, but they cannot replace good observation and judgement.
A commanding view—with a catch
Climb into the driver’s seat of a modern truck and the view is impressive. You’re looking over the roofs of surrounding cars, with large mirrors covering the sides and, increasingly, cameras and radar watching areas that are harder to monitor.
Yet a truck can still conceal an entire car, motorcycle, cyclist or pedestrian.
It’s a simple consequence of size. The driver’s eyes sit high above the road, the cab is broad and the combination may stretch more than 20 metres from bumper to bumper. Add a busy intersection and impatient traffic, and the job becomes demanding.
That’s why truck blind spots are not simply a problem for professional drivers. They are something every person sharing the road needs to understand.
A commanding view from behind the wheel. Modern Scania trucks combine digital mirrors and advanced driver-assistance technology to help drivers keep an eye on the road around them.
Four blind spots, not just one
Most motorists think of a blind spot as the small area alongside a vehicle. On a truck, the picture is much bigger.
The National Heavy Vehicle Regulator (NHVR) identifies four main blind-spot areas around a truck. Its We All Need Space road safety campaign explains these danger zones and offers practical advice for motorists sharing the road with heavy vehicles.
The front surprises people. Someone standing close to the bumper may fall below the driver’s direct line of sight. At the rear, there is no useful rear window through a loaded trailer; mirrors and, where fitted, cameras and detection systems are essential.
Then there are the sides. A car or motorcycle travelling beside a cab can be difficult to spot, while a cyclist riding along the left of a truck may disappear into a particularly dangerous area.
Blind spots also vary with cab design, mirror adjustment, vehicle configuration and the way the truck is moving. They are not neat little rectangles that remain in the same place all day.
The 360-degree camera system gives agitator drivers valuable visibility around pedestrians, site workers, gutters, bollards and tight job sites.
Turning trucks need more than their own lane
Watch a long truck negotiate a tight left-hand corner and you’ll see why keeping clear matters.
Its trailer wheels don’t follow the same path as the front wheels. They cut a tighter arc, while the driver may need to position the truck further right before turning left to clear the corner safely.
That manoeuvre can create an inviting-looking gap along the truck’s passenger side. It’s anything but an invitation.
A motorist darting into that opening risks occupying the trailer’s intended path. A cyclist or motorcyclist can be even more exposed.
In Australia, vehicles displaying a DO NOT OVERTAKE TURNING VEHICLE sign may, subject to the relevant road rules and safety requirements, occupy more than one lane while turning. The sign tells other road users to allow room.
If a truck indicates left but initially moves right, don’t assume the indicator is wrong. Give it space, stay behind and let the driver complete the turn.
Overtaking is about space, not bravado
Stay somewhere the driver can readily see you, not against the rear doors or alongside the cab.
Following too closely causes two problems. You may be hard for the truck driver to see, and you sacrifice your own view of traffic, road conditions and potential hazards ahead. Increase the gap and both drivers have a better chance to anticipate what comes next.
When overtaking, wait for a genuinely safe opportunity. Indicate, obey the speed limit and avoid spending longer than necessary in the truck’s side blind spots. Don’t begin the manoeuvre unless there’s enough room to complete it safely.
And once you’re past, resist the urge to dive straight back in front. A useful NHVR recommendation is to wait until you can see both truck headlights in your rear-view mirror before returning to the lane, provided there’s still a safe gap.
Remember, a heavy vehicle needs considerably more room to stop than a passenger car. The space in front of a truck is a safety margin, not a parking space.
Scania’s radar technology adds another set of electronic eyes, helping drivers detect vehicles and vulnerable road users lurking in blind spots.
Technology helps Scania drivers see more
Truck manufacturers have spent years reducing the risks associated with limited visibility. Improved cab design, mirrors, cameras, radar and advanced driver-assistance systems (ADAS) all play a part.
Scania’s safety portfolio includes;
- Blind Spot Warning
- Vulnerable Road User Collision Warning for the side and front
- Vulnerable Road User Detection at the rear
- Lane Change Collision Prevention.
Availability and operation depend on the truck and its specification.
The systems serve different purposes. Blind Spot Warning helps alert the driver to vehicles in difficult-to-see areas. Vulnerable-road-user systems focus on people such as pedestrians and cyclists close to the truck. Other assistance functions can help identify risks during lane changes.
Depending on the equipment, sensors can trigger visual or audible warnings as a potential conflict develops. Some Scania warning configurations have also used vibration through the driver’s seat.
The key word is assistance. Electronics can identify a hazard the driver might otherwise miss, but their coverage and capabilities have limits. They don’t give anyone permission to stop watching the road.
Professional drivers have responsibilities too
Making this entirely a lecture for motorists and cyclists misses half the story.
Truck drivers carry a particular responsibility because their vehicles are large, their movements affect surrounding traffic and the consequences of a mistake can be severe.
Before setting off, mirrors and cameras should be clean and properly adjusted, relevant warning systems checked, and the driver’s field of view kept clear. Once moving, frequent mirror checks and early, unambiguous indicating help other road users understand what the truck is about to do.
Urban intersections deserve extra attention. Cyclists, e-bikes, motorcycles and pedestrians can move into a critical area in the moments between the first mirror check and the actual turn. Check again immediately before committing to the manoeuvre, and be prepared to wait.
Likewise, lane-change alerts cannot replace checking beside the vehicle.
A good professional driver doesn’t simply expect others to stay out of trouble. They drive on the assumption that someone might make a poor decision.
Privacy curtains are great for a good night’s sleep, but covering your side windows while driving creates a blind spot that no amount of fancy technology can excuse.
Don’t create a blind spot of your own
Here’s an avoidable risk that technology shouldn’t have to solve: sleeper-cab privacy curtains pulled forward across the side windows while the truck is being driven.
Curtains are useful when parked. On the move, they can obstruct direct vision beside the cab, at intersections and near pedestrian crossings.
A cyclist or motorcycle can move alongside surprisingly quickly. If a curtain blocks the view, the driver may lose an opportunity to recognise the hazard before a warning system activates.
Mirrors, cameras and radar have their place, but none justifies deliberately covering a window. Drivers must maintain the visibility required for safe operation and comply with applicable road rules.
The simple answer? Leave the privacy curtains open until the truck is parked.
Narrow streets, parked bicycles and precious little room for error. Urban truck driving demands constant awareness of pedestrians, cyclists and other vulnerable road users.
For vulnerable road users, predictability matters
Pedestrians, cyclists and motorcyclists should treat the space around a truck with extra caution, particularly at intersections and in slow-moving traffic.
Never assume that because you can see the truck, its driver can see you. Where it’s practical and safe, make eye contact before crossing in front—but don’t treat eye contact alone as proof that it’s safe to proceed. Wait until the truck has stopped and you have a clear, safe crossing opportunity.
Cyclists should avoid riding up the inside of a truck preparing to turn left. Motorcyclists need to think carefully about filtering beside heavy vehicles, where a small change in position can put them into a blind spot.
Don’t linger immediately in front of a stationary cab, either. If the truck begins to move, the available space can disappear very quickly.
Technology helps. Staying visible and predictable remains the best first defence.
Sharing the road is a two-way conversation
Blind-spot safety isn’t about deciding whether trucks or cars are the problem. It’s about recognising that different vehicles have different limitations—and adjusting our behaviour accordingly.
Truck drivers need good observation, clear communication and properly functioning safety equipment. Motorists need to allow space for turning vehicles and resist cutting back in too closely after overtaking. Cyclists and motorcyclists need to avoid places where a truck driver may struggle to see them. Pedestrians need to remember that being close to a truck doesn’t necessarily mean being visible.
Scania’s approach brings vehicle design and electronic assistance into that shared responsibility. Cameras, radar and warning systems can reduce risk, but no technology makes a truck completely free of blind spots.
Combine a trained, attentive driver with well-designed equipment and road users who understand the dangers, and those blind spots become considerably less threatening.
That’s a far better outcome than discovering how big one is the hard way.
