Right Ahead Only Sign Post Mounted Diagram 609 R2/RA2This 609 post mounted sign indicates that all vehicular traffic must turn right ahead. These are commonly used where a single carriageway meets a dual carriageway at T junction. This sign is made from high quality Class 2 R2 reflective material placed onto a composite backing. The backing is made from plastic clad in thin aluminium sheets making it highly durable yet cost effective. This sign is defined in the TSRGD guidelines as diagram 609, more