Improvements were required to address the existing problems and provide capacity for increased demand arising from proposed employment and housing growth. The project involved removing the old roundabout and constructing two new roundabouts to allow road users to join and leave London Road and the M1 spur. A new underpass was also constructed, providing pedestrian and cycle routes. The M1 spur road was widened to three lanes, creating a continuous east-west carriageway with a speed limit of 50mph.
Managing the earthworks programme was a major factor in the successful delivery of the project, with 153,000m³ of material excavated. This included chalk, topsoil and hard breakout, which was reused or recycled where possible. Extensive traffic management also allowed traffic to continue flowing to and from Luton Airport and the town centre throughout the works.