The Committee of EEVC (European Experimental Vehicles Committee) decided at their 1984 policy meeting that an informal Working Croup on Heavy Goods Vehicles be set up to consider the road accident situation in Europe for these vehicles. It should also report upon the progress being made to improve the accident avoidance capability of such vehicles, the protection that would be provided for the crew and the protection that might be possible for other road users involved in accidents with Heavy Goods Vehicles. This informal Working Group did not start work until 1986. It was requested by the main EEVC committee in 1986 that it report in time to present papers to the OECD Symposium on this subject in April 1987 in Montreal, Canada and to the 11th ESV Conferencein May 1987 in Washington, D.C., U.S.A. The former objective has not been met, but the present report in preliminary form and without the final approval of the main EEVC committee is now presented.