Buses and Trams Only road sign (R139) Type:Chromadek It is used where multiple

It is used where multiple conflict points occur within a short distance

Urban roads and high-speed routes

This sign provides clear directional or confirmation guidance for escape routes

W401 and W402 form part of the W Series warning road signs

Buses and Trams Only road sign (R139) Type:Chromadek It is used where multipleThe Buses and Trams Only road sign (R139) is a regulatory command sign used to indicate that only buses and trams may proceed beyond the sign. Purpose and function This sign restricts access to designated routes or lanes to support public transport priority, improve travel reliability, and reduce congestion caused by mixed traffic. Typical applications Public transport corridors Urban centres with dedicated transit routes Approaches to stations and