Work to improve the busy A1 Black Cat roundabout on the Bedfordshire and Cambridgeshire border near St Neots starts at 0730 this morning.
The £5.6m scheme aims to ease congestion, improve journey times for road users and improve safety. It is part of the Government's £317million pinch point programme, which aims to boost local economies by reducing congestion and delays at key locations.
Millions of pounds of upgrades are due to begin next week to make the Black Cat roundabout on the A1 safer and reduce congestion.
The notorious stretch of road near St Neots on the Bedfordshire - Cambridgeshire border will see more than £5million of widening work, new safety fencing and installation of traffic lights aimed to keep traffic flowing.
The work will take place between 7.30am and 5.30pm from Monday to Friday and will last for six months.