The routes of the slip roads are as follows:

1. 1

   Junction with A14 Trunk Road at Catthorpe

   A route about 1.07 kilometres in length, from the new westbound carriageway of the A14 Trunk Road which the Secretary of State proposes to construct at Catthorpe to the existing northbound carriageway of the M1 Motorway the special road along this route being given the number 1 on the plan.

   A route about 0.71 kilometres in length, from the existing southbound carriageway of the M1 Motorway to the new eastbound carriageway of the A14 Trunk Road which the Secretary of State proposes to construct at Catthorpe the special road along this route being given the number 2 on the plan.