"Large or slow vehicles only"), 660.4 ("Loading only"), 661A ("Disabled badge holders only"), 661.1, 786 ("PARK HERE AND USE PHONE AT CROSSING"), 801 (when used with 804.1), or 969. The bay is white in colour and may be accompanied by the legend BUSES, DISABLED, LARGE OR SLOW VEHICLES ONLY or LOADING ONLY, marked outside the bay. It may be placed at the road edge or in the centre of the road. When marking a space for disabled users, the word DISABLED may be omitted, e.g. in streets with block paving, although use of the legend will help badge holders identify parking places more easily. It is recommended that all disabled bays in a locality are treated in the same way to avoid confusion. The bay may be extended to any length to accord with the traffic order. The legend should be repeated at intervals of about 12 m and marked on both sides when used in the centre of the road. If the road is too narrow to permit traffic (especially fire engines) to pass a 2700 mm wide DISABLED bay, the bay width may be reduced, subject to an absolute minimum of 1800 mm. When the width is 2700 mm or less, the transverse marking will be as in diagram 1028.4.
20.14 The LARGE OR SLOW VEHICLES ONLY variant of diagram 1028.3 may be used with the sign to diagram 660, similarly varied, at level crossings where drivers are required to stop and telephone before crossing. It may also be used to designate places for large vehicles awaiting police escort.
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