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 routes described in Schedule 2 to this Order which connect the main new trunk road with other highways at the places stated in Schedule 2 (the highways along these routes being in this Order referred to as “the slip roads”),
shall become trunk roads as from the date when this Order comes into force.