The latest in the government's insatiable thirst for blowing money on roads (induced demand, what's that?) might have a silver lining as one of the objectives is 'support all road users'. I think we should submit a response. Basic outline: they should apply IAN 195/16 on this proposed Major Road Network.
Regarding Cambridge, the most immediately affected road would be the A10 north of the A14, and possibly south of Trumpington. The 'Major Road Network' in the vicinity of is the A14, M11, A11, A505 and the A10.