Works at the entrance to or exit from a roundabout
Use advance signs to warn traffic on all approaches that there are works at or near the roundabout. Use ‘Keep right/left’ signs to guide traffic around the coned-off works site.
For single-carriageway approaches, try to keep two-way traffic flowing if possible, but remember the width restrictions (see the Traffic control section of this Code). However, if the works site makes the road too narrow to allow two-way traffic to pass and shuttle working is not practicable, you will need to consider restricting the road to ‘Exit only’ from the roundabout (Works at a roundabout, Cases A and B, Case A). In this case, the traffic usually entering the roundabout on this road will need to be diverted. This requires the permission of the highway authority and needs to be pre-planned, as adequate notice has to be given. Consult your supervisor, manager or other competent person.
Extra cones may be needed to restrict traffic to one lane going towards this exit with additional advance warning using ‘Road narrows’ signs provided on all approaches. Use ‘Keep right/left’ signs to guide traffic past coned areas.
Works in the circulatory area of a roundabout
Movement of traffic should be maintained if possible. Guard and cone the works and provide advance ‘Road narrows’ signs on all approaches. Use ‘Keep right/left’ signs to guide the traffic past the works site.
Where works are going to completely obstruct the circulatory area of a roundabout, consult your supervisor, manager or other competent person.
Varying the number of lanes on the circulatory section of a roundabout can distract drivers, therefore consider coning down to the same number of lanes on the approaches unless the traffic pattern dictates otherwise. Lane dedication signs might be needed. Vehicle turning paths need to be carefully considered to ensure the rear wheels of long vehicles do not hit the cones, and to ensure there is adequate width on the restricted approach.