HIGHWAYS, ENGLAND AND WALES 1 The new highways which the Secretary of State proposes to construct– a along the route described in Schedule 1 to this Order (the highway along this route being in this Order referred to as “the main new trunk road”; and b along the route described in Schedule 2 to this Order (the highway along this route being in this Order referred to as “the slip road” shall become trunk roads as from the date when this Order comes into force. 2 The centre lines of the new trunk roads are indicated by heavy black lines on the deposited plan. 3 The Secretary of State directs as respects of any part of a highway which crosses the route of any of the new trunk roads that– a where the highway is maintainable at the public expense by a local highway authority, the part in question shall be maintained by that authority; and b where the highway is not a highway so maintainable and is not maintainable under a special enactment or by reason of tenure, enclosure or prescription, the Secretary of State shall be under no duty to maintain the part in question, in either case, a date to be specified in a notice given by the Secretary of State to the highway authority for that highway. The date specified will not be later than the date on which the relevant route is opened for the purpose of through traffic. 4 The length of the trunk road described in Schedule 3 to this Order and shown by broad striped hatching on the deposited plan shall cease to be a trunk road and shall be classified as a principal road, as from the date on which the Secretary of State notifies the County Council of West Glamorgan that the new trunk roads are open for through traffic. 5 The Secretary of State is authorised to construct the bridge specified in Schedule 4 to this Order as part of the main new trunk road. 6 In this Order:– 1 All measurements of distance are measured along the route of the relevant highway; 2 i “the deposited plan” means the plan numbered HA10/2–WO79 marked “The Neath–Abergavenny Trunk Road (A465) (Improvement from Aberdulais to Glynneath and Slip Roads) Order 1991” signed by authority of the Secretary of State and deposited at the Welsh Office Repository, Curran Embankment, Cardiff; “the existing rounda bout” means the roundabout known as Aberdulais Inter change on the trunk road; “the main trunk road” and “the slip roads” have the meanings given in article 1 of this Order; “the new trunk road” means the new highways mentioned in article 1 of this Order; “principal road” as a classification for a highway, means that the highway is a principal road for the purposes of enactments and instruments which refer to high way classified as principal roads and is also classified for the purpose of every other enactment and instrument which refers to highways classified by the Secretary of State; and “the trunk road” means the Neath–Abergavenny Trunk Road (A465). 7 This Order shall come into force on 28th November 1991 and may be cited as the Neath–Abergavenny Trunk Road (A465) (Improvement from Aberdulais to Glynneath and Slip Roads) Order 1991. by authority of the Secretary of State Philip R. Marsden A Grade 6 Officer in the Welsh Office Dated the 1st November 1991