Buses, Bikes, Motorbikes and Taxi Post Mount Sign- 953B R2/RA2 (Face Only)Sign diagram number 953B states which types of vehicles are allowed access to the road ahead. This particular variant allows Buses, Cycles, Solo Motorcycles and Taxis only. These signs can be used for a wide range of reasons including relieving congestion, pollution and improving public safety. Where taxis should not use the road, "Buses, Push Bikes and Motorbikes Only" (953A) would be more appropriate. The sign may have a supplementary plate to read