LONG VEHICLES
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May be used with diagram 528, 572, 573, 783, 785.7 or 786
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"LONG LOW" may be varied to "LARGE OR SLOW".
May be used with diagram 607. 7, 782, 785. 7, 786, 787 or 788'
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May be used with diagram 786, 787 or 788. "must phone" may be varied to "must use SOS phone"
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May be used with diagram 782 or 783. The telephone number may be varied and "RAILWAY" may be varied to "TRAM Co."
21.13 Diagram 782 is used at crossings where there is a risk of long or low vehicles grounding and causing an obstruction which might not be cleared before the next train arrives at the crossing. It is necessary to consider both the approach profile and the relative levels of the running rails. For guidance on the use of this sign with hump bridges see para 7.1.
21.14 Diagrams 783, 784.1 and 785.1 instruct drivers of long, low, large or slow vehicles to phone to obtain permission before crossing the railway. The smallest size of the sign to diagram 785.1 (25 mm x-height) is intended to be read only by a driver having alighted. A larger size will be required if it is necessary for the sign to be read from a moving vehicle. As non-compliance with the sign to diagram 784.1 could result in an accident or expose a driver to prosecution, it is essential that this group of signs is appropriately sized and properly maintained.
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