Papers presented at the third session of the OECD symposium on the role of heavy freight vehicles in traffic accidents include: analysis of heavy freight vehicle and tank truck accidents (stedtnitz,w and appel,h); on the braking safety of articulated heavy freight vehicles (strandberg,l); technical defects in brake systems of commercial vehicles as the cause of traffic accidents (grandel,j); collision situations and consequences of injuries in traffic accidents of heavy trucks (otte,d); truck driver's involvement in traffic accidents as related to their shiftworks and professional features (hamelin,p); vehicle factors in accidents involving heavy freight vehicles (clarke,rm and leasure,wa). For the covering abstract of the symposium see IRRD 291011. (TRRL)