Work commenced at the northernmost part of the M18 motorway on both carriageways to carry out essential maintenance to replace worn out carriageway. This is running concurrently with ongoing roadworks already in progress beyond the southern end of the M18 motorway on the M1. Where necessary to avoid unnecessary delays and congestion, such work is scheduled to take place consecutively. However, during preparation of the project, traffic analysis techniques were used to ensure that the M18 work would not adversely impact on the M1 widening project. Evidence on site to date suggests that this has been the case.