M20 Junction 4 Eastern Overbridge

This scheme saw the eastern bridge over the M20 Junction 4 (West Malling) widened to provide an extra traffic lane, increasing the road from 2 lanes to 3 lanes. The new widened bridge opened on 5 February 2017.

The scheme included:

  • widening of the eastern bridge over the M20 to provide an extra traffic lane (from 2 lanes to 3 lanes)
  • minor changes to the top of the east facing slip roads to accommodate the widened bridge

The western overbridge was resurfaced and junction improvement works were carried out in autumn 2017.

The temporary restriction on turning right out of Castle Way has now been made permanent. Further works will take place to improve access on the Park Road roundabout in autumn 2017.

Scheme plan

M20 Junction 4 Eastern Bridge Widening indicative scheme plan (PDF, 217.8 KB)

The principal contractor was John Sisk and Son.

Watch a video of the bridge beams being installed.

M20 Junction 4 is a key connection of the A228 with the motorway network.

The A228 runs from the Isle of Grain to the A21 at Tunbridge Wells. Part of this route runs along the Medway Valley, which has many homes under construction or planned, such as at Holborough and Peter's Village, Wouldham.

The scheme provides extra space on the junction to help reduce congestion, improve the operation of the junction and improve safety.

View scheme newsletters:

The £5.69 million project has been secured by Kent County Council, with £2.2 million from the Local Growth Fund obtained from the South East Local Enterprise Partnership, and the £3.69 million match funding.

Formal scheme approval was made by:

Funded by

The government Growth Deal provides money to the South East Local Enterprise Partnership, funding projects which drive Kent’s economic and business growth.