Traffic Merges Ahead on to Main Carriageway Warning Sign 

- Post Mountable with 2 fixing rails

- Class 2 R2/RA2 Reflective

- Available in 450mm, 600mm, 750mm, 900mm Tri

traffic merges on to main carriageway ahead sign is used to warn road users that the road they are travelling on is going to merge onto a main carriageway ahead. This sign allows road users to prepare to match the speed of traffic on the main carriageway and be ready to merge. The 509.1 diagram UK road sign has no variation. 

Specification: 

Material: R2/RA2 reflective overlay on aluminium composite backing

Fixing Method: 2 fixing rails for post mounting

Reflectivity: Class 2 R2/RA2

As per the UK Highways Traffic Sign Manual Chapter 4 - Warning Signs page: 18 The following advice is given:

2.3.1.  A sign to diagram 508.1 (S2‑2‑5, see Figure 2-6) or 509.1 (S2‑2‑6, see Figure 2-7) is used to give warning where two physically separated streams of traffic proceeding in the same direction join the same carriageway. These signs may be used only in situations where the traffic stream joining from a slip road crosses a road marking to diagram 1010 and is required to concede priority to any through traffic. They are not intended for use at lane gain junctions where one or more traffic lanes are added to the main carriageway. Diagrams 873 and 874 (S11‑2‑14) may be used in these circumstances.