Abstract
Three VTI reports are presented. They document the results of tests on behalf of the National Road Administration and the Traffic Safety Office as part of the 1988 investigation on studded tyres. The investigation included a commission from the Government to the National Road Administration and the Traffic Safety Office in August 1988 to determine how road wear can be reduced through changes in the regulations on the use of studded tyres. The two authorities were also asked to study the consequences in terms of social economics of a prohibition on studded tyres and the possibility of applying economic constraints to limit their usage. The effects on traffic safety of various actions in this