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 which connects the trunk road with other highways at the place stated in the 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.