For the purposes of regulation 3, “the specified lengths of carriageway” are the following lengths of the westbound carriageway of the M621 Motorway in the City of Leeds—
(a) the length which lies between a point 145 metres east of the centre line of the bridge over Belle Isle Road and a point on the centre line of the Dewsbury Road overbridge;
(b) the length which lies between a point 86 metres east of the centre line of the underpass connecting Holbeck Moor Road and Lane End Place and a point 32 metres west of the centre line of the footbridge connecting Tilbury Road with Elland Road;
(c) the length which lies between a point 16 metres east of the centre line of the Lowfields Road underpass and a point 108 metres west of the centre line of the railway bridge between junctions 1 and 2.