A338 and Blackwater Junction Info

Information for road users

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A338/Blackwater Junction Improvements - Scheme completed June 2019

B3073 Blackwater West Junction Improvements - Scheme commenced July 2019 - Spring 2020

What's happening? Information for road users:

The B3073 Blackwater West Junction Improvements, started in summer 2019, is the latest scheme to benefit from £45.2 million investment in the county’s transport infrastructure as part of Dorset Local Enterprise Partnership (LEP)’s Bournemouth International Growth (BIG) Programme.

The scheme is part of the BIG Programme funded through Dorset LEP secured Dorset Growth Deal* aimed at facilitating better access into and around Bournemouth Airport as well as unlocking employment land and stimulating economic growth.

These improvements are taking place on the B3073, with no further works on the A338 northbound. Advanced temporary traffic signals will be in place to maintain traffic flow at the Blackwater West junction, as they mimic the previous layout. During out of hours any issues with the lights can be reported to BCP Council, please call 01202 451145.

What are we actually doing?

The nine month long scheme aims to:

  • Improve the on and off slips to the A338
  • Improve cycle and footpath facilities on the B3073
  • Increase junction capacity by widening the road on both sides to create an additional lane
  • Ease congestion
  • Better traffic flow
  • Increase journey time reliability
  • Improve connectivity

Phase 1: July 2019 to September 2019

South west area - structural works begin on a new embankment to enable the carriageway to be widened.

Phase 2: July 2019 to October 2019

South east area – structural works on the embankment will be carried out to allow for carriageway and footway widening. A new noise fence will also be installed, and landscaping works carried out.

Phase 3: August 2019 to December 2019

North east area – a new A338 on-slip will be constructed on the north side of the electricity pylon. From Monday 5 August, work will begin along the B3073 to Hurn Court Road. This will involve widening the carriageway to form 3m cycleway and footway.

Phase 4: November 2019 to Spring 2020

Whole junction – new islands and traffic signals will be installed. The whole junction will be resurfaced at the end of the scheme.

See full phasing plan.

COVID-19 Service disruption update

Work is continuing where it is possible to adhere to government social distancing guidelines, so you may still see road workers on site. The situation may change pending further guidance from central governement. Further information will be provided when available.

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