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M4 J24 Coldra to J28 Tredegar Park– Installation of Average Speed Enforcement System 16/11/20-28/02/21

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Where and Why?

Works will be undertaken to decommission the existing Variable Speed Limit (VSL) system between J24 Coldra and J28 Tredegar Park of the M4, and to introduce a new 50mph Average Speed Enforcement (ASE) system. These works are required to help manage on-going congestion issues along this stretch of the M4.

Works are programmed to commence 16th November 2020 and end 28th February 2021; however, some advanced vegetation clearance works are programmed to commence 2nd November 2020.

Diversions and Safety Measures

The majority of the scheme will be undertaken utilising lane 1&2 and lane 2&3 closures. Total closures will be required to complete the gantry works, finalise signs in the verge and central reserve, and to remove road markings on all lanes unobstructed.

The diversion route for total closures between J24 Coldra and J28 Tredegar Park will utilise the A48 Southern Distributor Road (SDR). During full closures, signed diversions routes will be in place to manage the flow of traffic and advance notification signs will be provided.

Programme of Traffic Management Restrictions*

  • Due to associated safety requirements, these works will be undertaken overnight Monday to Friday, between 20:00 hours and 06:00 hours.
  • Phase 1 and 2 of these works will be completed utilising lane closures only. Following phase 1 and 2, two batches of total closures will be utilised for both the eastbound and westbound carriageways.
  • The first batch will involve 12 total closures of the eastbound carriageway 30th November 2020 to 15th December 2020, and 15 total closures of the westbound carriageway 15th December 2020 to 19th January 2021.
  • No works will take place over the Christmas shut down period 21st December 2020 to 3rd January 2021.
  • The second batch will involve 10 total closures of the eastbound carriageway 20th January 2021 to 2nd February 2021, and 14 total closures of the westbound carriageway 3rd February 2021 to 22nd February 2021.

**Please note, programme may be subject to change.

Enquiries

For further information, please contact Traffic Wales on 0300 123 1213 or via Twitter @TrafficWalesS


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