After studs in Minnesota. Paper presented at the 52nd Annual Meeting of the Highway Research Board HRB, Washington, D.C., January 1973.

After six winters of legalized use in Minnesota (1965-1971), studded tyres were prohibited during the winters of 1971-1972 and 1972-1973. Comparisons are made of the effects observed after 1 year without studs as against the previous 6 year period with studs. All things considered, there was no appreciable increase in traffic accidents because of discontinuance of studded tyres. Noise level measurements indicated that pavements badly worn by studded tyres and having coarse aggregate particles exposed could yield noise levels almost twice as high the original surface texture might produce.