Permanent Traffic Regulation Orders A4 London Road / Bath Road TROs. High Street Langley at A4 (London Road) Left-Turn NOM TRO. Holy Family Catholic Primary School Street (Langley High Street) TRO, NOM and plan. Wexham Court Primary School Street (Moat Drive) TRO, NOM and plan. Speed restrictions A4 Slough (30mph and 40mph Speed Limit) NOI, TRO (draft) and plan. High Street Langley Service Road 20mph Permanent NOM TRO. High Street Langley 20mph extension Permanent TRO. West Britwell Area 20mph NOI TRO. Parking zones and restrictions London Road Bus Lane - draft TRO, Notice of Intent and Plan. London Road Controlled Parking Zone. K2 Zone amendment NOM TRO. Next page : Experimental Traffic Regulation Orders Previous page : Temporary Traffic Regulation Orders