A £25m road is officially opening in Cambridge, linking Addenbrooke's Hospital with Trumpington and the M11.
The 1.5 mile (2.41km) road is set to be used by 21,500 vehicles a day when developments in the area are completed.
It will provide a link to the Cambridge Biomedical Campus (CBC) which is home to Addenbrooke's and Rosie hospitals.
Funding has come from developers working in the area and the government's Growth Area Fund.
The council said the road would unlock land for major housing developments in the area around Clay Farm and Glebe Farm.
The new route links Hauxton Road to Shelford Road, and onto the CBC using a new bridge over the London to Cambridge railway line.
Pedestrians and cyclists will also be able to use the route.