Words substituted by Road Traffic (Consequential Provisions) Act 1988 (c. 54, SIF 107:1), s. 4, Sch. 3 para. 25(1)

S. 21(3) substituted (1.11.1991) by New Roads and Street Works Act 1991 (c. 22, SIF 59, 108), s. 168(1), Sch. 8 para.33; which substitution is in force for Scotland only by S.I. 1991/2286, art. 2(2), Sch. 2. and for England and Wales only by S.I. 1991/2288, art. 3,Sch.

http://www.legislation.gov.uk/ukpga/1984/27/section/21Road Traffic Regulation Act 1984An Act to consolidate the Road Traffic Regulation Act 1967 and certain related enactments, with amendments to give effect to recommendations of the Law Commission and the Scottish Law Commission.1985-01-01texttext/xmlenStatute Law Database2026-06-17Expert Participation2026-06-05Road Traffic Regulation Act 1984s. 87(1)(a)Deregulation Act 2015s. 50(2)(a)s. 115(3)(d)Road Traffic Regulation Act 1984s. 87(1)(aa)Deregulation Act 2015s. 50(2)(b)s. 115(3)(d)Road Traffic Regulation Act 1984s. 87(1)(c)Deregulation Act 2015s. 50(2)(c)s. 115(3)(d)Road Traffic Regulation Act 1984s. 87(1)(b)Wales Act 2017s. 26(6)(a)Sch. 7 paras. 169s. 71(4)reg. 3(f)Road Traffic Regulation Act 1984s. 87(7)Wales Act 2017s. 26(6)(b)Sch. 7 paras. 169s. 71(4)reg. 3(f)Road Traffic Regulation Act 1984Actart. 48(6)(a)art. 6(2)art. 1Road Traffic Regulation Act 1984s. 87(1)(a)Crime and Courts Act 2013Sch. 8 para. 29(3)s. 61(2)art. 3(v)Road Traffic Regulation Act 1984Sch. 4 para. 22(5A)Planning (Consequential Provisions) (Wales) Act 2026Deddf Cynllunio (Darpariaethau Canlyniadol) (Cymru) 2026Sch. 2 para. 200(4)(d)Sch. 5 Pt. 1s. 5(2)Part II Traffic Regulation in Special Cases
21 Permit for trailer to carry excess weight.(1)

As regards any road or bridge the appropriate authority may, subject to such conditions as they think fit, grant a permit in respect of any trailer specified in the permit, when drawn by a heavy locomotive or a light locomotive on the road or bridge, to carry weights specified in the permit, notwithstanding that, when conveying such weights, the trailer does not comply with any regulations made, or having effect as if made, by the Secretary of State under section 41 of the Road Traffic Act 1988 as to the weight laden of trailers or as to the maximum weight which may be transmitted to the road or any part of it by trailers.

(2)

Where such a permit is granted in respect of a trailer it shall not, so long as the conditions (if any) attached to the permit are complied with, be an offence to carry on the road or bridge weights authorised by the permit by reason only that the trailer, when conveying them, does not comply with any such regulations.

(3)

The appropriate authority for the purposes of this section is—

(a)

in relation to a bridge for the maintenance of which a bridge authority is responsible, or a road passing over such a bridge, the bridge authority;

(b)

in relation to any other road, the traffic authority and any other person responsible for the maintenance of the road.