 Between junction 4 and junction 5, the road passes across the Wolverhampton to Shrewsbury railway line, and through the centre of Telford.Between junctions 6 and 7, the road runs around the south of Wellington before joining the A5 (Map), which continues on to Shrewsbury as dual carriageway.Telford Motorway Service Station opened on 18 March 2003 at junction 4, and is operated by Welcome Break.