These Regulations impose speed limits of 50 m.p.h. and 60 m.p.h. on specified lengths of the M275 Motorway and specified slip roads of it and the M27 Motorway at Portsmouth. It replaces the existing 70 m.p.h. speed limit imposed by the Motorways Traffic (Speed Limit) Regulations 1974 (S.I. 1974/502). A full regulatory impact assessment has not been produced for this instrument and it has no impact on the costs of business.