form of flanged rail and requires special mounting to transfer weight and stabilise the gauge. If the roadway subsurface carries the weight, steel ties are needed at regular intervals to maintain the gauge. Installing these requires excavating and reinstating the entire surface.

Block rail

Block rail is a lower-profile form of girder guardrail in which the web is eliminated. In profile, it is more like a solid form of bridge rail with a flangeway and guard added. Simply removing the web and combining the head section directly

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