A TIME-lapse video shows the progress made on the Black Dam Roundabout.

Highways England has released the footage showing the improvement works to the roundabout at junction 6 of the M3, which are part of the Government's £317million pinch-point programme to remove bottle necks and keep traffic moving.

The new layout is aimed to improve traffic flow, reduce congestion and increase safety at this busy roundabout.

The video shows how the construction of the new road through the middle of the roundabout has progressed.

Neil Andrew, Highway England asset manager, said: "We have made a great deal of progress on these important improvements, but there is still more to do. We've had to move a major gas main and high voltage electrical cables, which has taken longer than planned, but the improvements are well underway and we are looking forward to the improved junction opening to traffic this autumn.

"I recognise that our work has caused disruption and we are working to continue to reduce the impact on road users, businesses and the local community."

Work still needs to be done on sections and link roads.

Weekend closures of the northbound M3 link onto the roundabout will be in place over the next two weekends, while the southbound link to the M3 will remain open on both weekends.

The main construction is being carried out following the relocation of utilities, and some elements of the widening have already finished, including the carriageway construction alterations to Ringway south and the southbound spur to the M3.

Progress continues to be made on the A30 London Road Eastbound.

A substantial amount of work is still needed to complete other sections, including drainage, new gantry installation and traffic lights to manage the operation of the junction.

To construct the new layout from the M3 onto the roundabout and reduce further delays, Highways England will be closing the northbound link from the M3 and reducing the roundabout to one lane over two weekends.

This will enable work to be completed under two weekend closures rather than a series of overnight lane closures.

The closures will be in place:

• from 10pm on Friday June 19 until 5.30am on Monday June 22

• from 10pm on Friday June 26 until 5.30am on Monday June 29

The southbound link to the M3 will remain open.

Clearly signed diversions will be in place for the exit slip roads via either junction 5 or 7.