A801 Roundabout at M8 Junction 4 - Road Closure (Monday 3 Feb)

Various closures will be in place at the A801 Roundabout M8 Junction 4 for full road and roundabout reconstruction.

The closures will be as follows:

  1. Closure of A801 from the junction with the A705 to Pottishaw Roundabout.
  2. Closure of right and left turn lanes to access the A801 from the A705
  3. Closure of On and Off Slips for Junction 4 of the M8
  • The closures will be in place from 12.01am on Monday 3 February until 11.59pm on Sunday 8 March

Diversions

For A801 northbound/southbound:

  • Local Traffic Travelling Eastbound on the A705: Diversion via A705, West Main Street Blackburn, B792, and A7066 and vice versa for traffic travelling Eastbound on the A706.
  • Local Traffic Travelling Westbound on the A705: Diversion Via A705, Main St Whitburn, and A706 and vice versa for traffic travelling Westbound on A7066.

Westbound Traffic accessing the M8:

  • From the North diversion via the A706, B7066 and Balgornie Road to access the M8 via Junction 4A.
  • From the South diversion via A705, East and West Main Street Whitburn, B7096 and Balgornie Road to access the M8 via Junction 4A.

Eastbound Traffic accessing the M8:

  • From the North diversion via the A7066 and A779 to access the M8 via Starlaw East Roundabout at Junction 3A.
  • From the South diversion via the A705, West Main Street Blackburn, B792, A7066 and A779 to access the M8 via Starlaw East Roundabout at Junction 3A.

Traffic on the M8:

  • Exit the M8 at Junctions 3A or 4A and follow local signage

Map of closure and diversions

M8 Junction 4

M8 Junction 4 Key


Frequently asked questions

Why is the roundabout at J4M8 closed between 3 February to 8 March 2020?

  • The road closure is being placed on the roundabout to allow essential full road reconstruction work to be carried out.

Will the works require the full duration of the closure?

  • The contractor has programmed the works for four weeks, which includes weekend working.  A total of five weeks have been allowed in the road closure notice in case the works overrun due to weather or unforeseen circumstance.

Why is this work needed?

  • A site investigation was undertaken on the roundabout last year utilising the traffic management in place during the bridge works carried out by Transport Scotland's contractor, Amey. This investigation found that the continuous potholing that is occurring on the surface of the roundabout is a result of the existing stabilised blaze, which forms the foundation of the carriageway, having failed and requires to be replaced.  In addition, the existing road construction depth was found to be significantly less than the 350mm depth that current design guidelines require for the type of vehicle loading that is now experienced on this roundabout.

What does this work involve?

  • Due to the problems found, it is necessary to excavate to a depth of 1.08m to remove the failed stabilised blaze and reconstruct to carriageway to a suitable depth.

Why do the works need to be carried out under a road closure?

  • Due to the depth of excavation required, it is not practicable to provide traffic management that would allow the routes to remain open for the duration of the work, or work during the night and reopen the road safely during the day.  The only safe option is to carry out the works under a road closure, which will allow the works to be completed quicker due the contractor having full control of the site.

Could the works be carried out under a road closure at the weekends only?

  • Based on the contractor's four week programme, we estimate that it would take 14 weekends to complete the work only and increase the cost of the project by 25%. The extended period of disruption to traffic  in the area and additional costs means this is not a viable option.

Why can't measures be put in place as previously for works to proceed without total closure?

  • Previous works only involved the resurfacing of the roundabout which can be managed within lane closure. A full reconstruction project requires a road closure.

Is there no alternative solution that could be put in place for the works?

  • The condition of the road means it is essential a full reconstruction work is carried out soon. There are no other practicable alternative arrangements that would ensure the works are progressed safely and timeously.

Will this road closure affect public bus services?

Will this road closure affect school bus service?