The Official Highway Code

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Level crossings

292

Overhead electric lines. It is dangerous to touch overhead electric lines. You MUST obey the safe height warning road signs and you should not continue forward onto the railway if your vehicle touches any height barrier or bells. The clearance available is usually 5 metres (16 feet 6 inches) but may be lower.

Laws RTA 1988 sect 36 & TSRGD reg 17(5)