Driver monitoring systems are an increasingly important part of vehicle safety. But while the fundamental objective is the same across vehicle types, understanding whether a driver is attentive, alert and ready to respond, the environment in which that monitoring takes place can be very different.
A truck is not simply a larger passenger car. Its cabin geometry, driving patterns, operating hours and use cases create a different set of challenges for driver monitoring. For OEMs developing heavy commercial vehicles, this means choosing a DMS that has been specifically designed to accommodate those differences.
One of the most obvious differences is the cabin itself.
Truck drivers typically sit much higher than passenger-car drivers, in considerably larger cabins. Seats and steering wheels can offer extensive adjustment, creating a much wider range of possible driver positions. At the same time, the size and layout of the cabin may require the DMS camera to be positioned further away from the driver's face.
For a vision-based DMS, these differences matter. The system needs to reliably detect and interpret the driver's face, eyes, head position and behavior across different seating positions and camera placements. A solution developed around the relatively constrained geometry of a passenger car may therefore face very different conditions when deployed in a truck.
Even normal driving behavior looks different.
The height of the vehicle, large exterior mirrors and different fields of view mean that truck drivers naturally direct their gaze differently from passenger-car drivers. Checking a large side mirror or monitoring an adjacent blind spot can require significant head and eye movement.
Without an understanding of the vehicle geometry and expected driver behavior, a legitimate safety check could be interpreted as distraction.
Good driver monitoring is therefore not simply about detecting where somebody is looking. It is about understanding that behavior in context.
For a passenger-car driver, driving may occupy an hour or two of the day. For a professional truck driver, the cabin is a workplace.
EU regulations allow professional drivers to spend up to nine hours per day driving, with this extendable to ten hours twice a week. Weekly driving time can reach 56 hours. This means a DMS may be interacting with the same driver for many hours, day after day.
That makes reliability particularly important.
An occasional false alert in a passenger car may be irritating. A false alert triggered repeatedly during a professional driver's working day can quickly become a significant source of frustration.
Consider a particular mirror-checking behavior, seating position, pair of sunglasses or lighting condition that repeatedly causes an incorrect distraction warning. On a regular freight route, the same combination of driver, vehicle and environment may occur again and again.
Over thousands of kilometers, small weaknesses in system performance become very visible.
For commercial vehicle manufacturers, DMS performance therefore affects more than regulatory compliance. It influences the driver's everyday experience of the vehicle and, ultimately, their trust in its safety systems.
This matters particularly because fatigue remains a major challenge in commercial transport. A large-scale survey from the European Transport Workers’ Federation (ETF) reveal that 60% of truck drivers admit they regularly drive while experiencing fatigue, and even more alarmingly, 33% report actually falling asleep while at the wheel while driving. A DMS can play an important role in identifying signs of drowsiness and distraction, but warnings only remain valuable if drivers trust them.
Commercial vehicle manufacturers face another challenge: variety.
A passenger-car platform may be produced in very large volumes. Heavy commercial vehicles, by contrast, can encompass a broad portfolio of configurations, including long-haul trucks, construction vehicles, specialist vehicles and other purpose-built platforms.
Yet vehicles operating on European roads still need to meet applicable safety requirements.
Developing and validating an entirely new driver monitoring solution for every cabin configuration is neither practical nor scalable. OEMs need DMS technology that can accommodate different vehicle geometries and camera positions without turning each new configuration into a major development project.
This places particular importance on flexibility.
Neonode's Driver Monitoring System software is designed to maintain consistent performance across different camera placements and vehicle configurations. This allows the system to be adapted to different cabin geometries primarily through configuration, helping manufacturers support a wider vehicle portfolio without starting again for every platform.
Furthermore, the system can be used for other value-add features.
Neonode's Digital Mirror Augmentation technology, for example, understands the driver’s behavior to pan the digital mirror image and replicate the feel of a reflective mirror, thus enhancing the driver experience using the same camera-based technology.
Rather than treating DMS as an isolated compliance function, commercial vehicle manufacturers can consider how camera-based perception can contribute to a broader understanding of both the driver and the environment around the vehicle.
The fundamental task of driver monitoring may appear universal: determine whether the person behind the wheel is attentive and capable of driving safely.
But context changes what "attentive" looks like.
A gaze direction that is unusual in a passenger car may be completely normal in a truck. A camera position that works well in one cabin may not be possible in another. And a false alert that occurs occasionally in private driving can become a recurring problem for somebody who spends up to nine or ten hours a day behind the wheel.
For commercial vehicles, effective driver monitoring therefore requires more than transferring passenger-car technology into a larger cabin. It requires a system that understands the geometry, behavior and realities of professional driving.