The Wolverhampton to Shrewsbury Line is the railway line from Wolverhampton to Shrewsbury via Wellington; it was originally built by the Shrewsbury and Birmingham Railway. The line is double track throughout, with rarely used relief sidings at Cosford and 4 tracks through Wellington station. Electrification from Stafford Road Junction to Oxley, is provided solely to enable electric stock to access Alstom's Oxley TRSMD, and is therefore constructed as a "tram wire" suitable for low speeds only.