Train Level Crossing Sign Post Mounted - 771 R2/RA2 (Face Only)For open railway crossings without a gate or barrier, warning sign, diagram 771 should be used to highlight the potential hazard of a train crossing the road. Looking for a gated crossing sign? Diagram 770 should be used when there is a gate or barrier. However, open tramway crossings are better signed using the tram warning sign, diagram 772. You can order diagram 771 from 450mm 1500mm, the standard range for most warning signs. Please contact our