Traffic sign A7a: Road narrows on both sides

The A7a sign warns that the road ahead narrows on both sides. On a worksite it stands before barriers that close in the road from both sides, so drivers slow down in time and keep to the middle.

Warning signs are triangular with a red border. They warn of a hazard ahead and are normally placed about 150 metres before it (Highway Code, art. 66.2). On a worksite they announce what the driver is about to meet: roadworks, a narrowing, an uneven surface.

Anyone who puts up a traffic sign on the public road for works needs the consent of the road authority: through the occupation permit or through a signage permit with a signage plan. Without that consent you may not put up the sign.