"The first phase of the project is to build a new temporary road that will divert traffic away from the existing M1 J10a spur and allow the London Road underbridge to be to be constructed with the minimal possible impact on road users."
So a whole new temporary spur road is also going to be built. All work finished in 70 weeks! Lets hope that the 18 month project to upgrade Airport Way that actually took 3 years is not repeated this time.