To reduce the risk of tilting, TNO has developed a tilt warning system for commercial vehicles. This system is able to monitor vehicle weight, lateral acceleration and velocity during normal operation. The system CPU is constantly comparing the measured lateral acceleration to a calculated limit value. It can be connected to a PC, providing the opportunity to on-line or off-line analyze trip data. The system has proven itself as a useful educational and off-line warning tool for commercial vehicle drivers. TNO has patented the system.