<P> In 1966 , at the end of the 4 - month trial of a blanket 70 mph ( 113 km / h ) speed limit on previously unrestricted roads and motorways , speed checks on the M6 in Cheshire suggested that although cars were actually being driven about 10 mph ( 16 km / h ) faster , they were still usually travelling at speeds below the new limit . The crash rate was lower on the M6 in Staffordshire ( the better weather was noted too ) and continued to fall on the M5 in Worcestershire as it had before the new limit was imposed , and there was no change in the crash rate on the M6 in Cheshire or on the M1 in Northamptonshire . </P>
<P> In 1966 , at the end of the 4 - month trial of a blanket 70 mph ( 113 km / h ) speed limit on previously unrestricted roads and motorways , speed checks on the M6 in Cheshire suggested that although cars were actually being driven about 10 mph ( 16 km / h ) faster , they were still usually travelling at speeds below the new limit . The crash rate was lower on the M6 in Staffordshire ( the better weather was noted too ) and continued to fall on the M5 in Worcestershire as it had before the new limit was imposed , and there was no change in the crash rate on the M6 in Cheshire or on the M1 in Northamptonshire . </P>
what is the speed limit on the m5
what is the speed limit on the m5
70 mph
70 mph