Quayside Or River Bank Ahead Post Mounted Sign - Dia 555 R2/RA2 (Face Only)Wherever a public road approaches a quayside or riverbank that is not protected by a barrier, the sign to diagram 555 is required. To emphasise the edge of the road, the use of hazard markers to diagram 560, chevrons to diagram 515, or direction signs are beneficial to face traffic which may struggle to see. The sign itself may be used with a distance plate with or without a left or right arrow, or with a left right arrow by itself. The diagram comes