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 to connect the main new trunk road with another highway at a place stated in that Schedule (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.