21.5 Diagram 775 is used at all automatic and open crossings. It should not be used at crossings with manually controlled barriers, nor at those which are user operated, unless specifically authorised in the Level Crossing Order. At automatic crossings, it should be placed on each primary and duplicate primary signal post. At open crossings, it should be mounted on both sides of the road, on or near the post carrying the sign to diagram 774.
21.6 Diagram 776 is used at locally-monitored automatic open crossings on double-track lines, where two trains can arrive in quick succession. The sign should be sited on the left hand side of the road.
21.7 Diagram 777 is used at all automatic crossings on double-track lines. The sign should be placed on or near each duplicate primary road traffic signal.
21.8 Diagrams 778 and 778.1 are used with the GIVE WAY sign to diagram 602 and not with signals to 3014. Special authorisation (see para 1.5) is required to use diagram 778.1 with the STOP sign to diagram 601.1.
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