Traffic Updates

We are beginning works to widen the A358 Toneway from the Heron Gate roundabout to the Junction 25 roundabout. This initially includes removing the central reservation and replacing the old concrete carriageway – important work to eventually increase the capacity of the Toneway.

From Saturday 27th July between 8pm and 6am the A358 Toneway will be closed for four nights between the Heron Gate roundabout and Junction 25 while traffic management is installed.

In order to keep both the public and the workforce safe it will be necessary to temporarily reduce the speed limit to 30mph and also reduce the number of live lanes on the Toneway. Two lanes will be maintained during the day heading inbound towards Taunton from Junction 25 but only one lane will be available for traffic heading outbound from Taunton towards Junction 25 (see plan below). This is due to deep excavations in the highway and the need for working space during the construction works.

We expect this arrangement with two lanes inbound and one lane outbound to remain in place until summer 2020 before works switch elsewhere and we’ll keep you updated.

For more information, including FAQs, please visit .

The plan below shows the diversion route for these four closure nights – the solid line suitable for all vehicles and the dotted line for light vehicles only.