M3 Junction 6 Black Dam Improvement full weekend closure 5-8 February

The Black Dam Roundabout will be fully closed from 10pm Friday 5 February to 5am Monday 8 February.  During this period, all approaches to the roundabout will be closed with clearly signed diversion routes in place. 

This closure will allow all surfacing work to be completed, along with signals, signs, safety barriers and road markings. 

  • A339 north and southbound
    (Diversion via A339 Ringway North and A340 Ringway West)
  • A30 London Road east and westbound
    (Diversions via M3, or B3349 and A33 for non-motorway traffic only)
  • A30 Ringway South east and westbound*
    (Diversion via A339 Ringway North and A340 Ringway West)
  • M3 Spur north* and southbound
    (Diversions via M3, or B3349 and A33 for non-motorway traffic only)

Please allow extra time for journeys while this work takes place.

*one lane will be open on the M3 Spur northbound to the A30 Ringway South westbound between 6am and 9pm on Saturday 6 and Sunday 7 February