With the increasing trend in the use of light goods vehicles (LGVs) instead of heavy goods vehicles (HGVs) to transport goods for local deliveries, we decided to compare the type and severity of real life collisions between cars and HGVs, and cars and LGVs, looking at the severity of the impact with respect to the occupants of the cars. To this aim, the Co-operative Crash Injury Study was used to study impacts of the above types. It was decided to compare car frontal impacts with a principle direction of force of between 11 o'clock and 1 o'clock due to the frequency of this type of accident. 198 car vs HGV and 148 car vs LGV accidents were studied involving 456 front seat car occupants. Only front seat occupants wearing a seat belt were included in the analysis. The collisions were analysed to gather information on type of impact, severity of impact, and occupants were studied to consider types of injury and causation of these injuries.