English: A414 North Orbital Road near St Albans The North Orbital Road was an early precursor to the M25 Motorway and was planned in the 1920s as a road circulating around the north side of London at about a 20 mile radius of Charing Cross. It was planned to start at Colnbrook on the A4 and, skirting past Rickmansworth, St Albans, Hatfield, Hoddesdon, and Brentwood, to terminate at Tilbury, a distance of about 75 miles. In the event only sections of it got built before the Second World War intervened. Some sections of it were then planned to be incorporated into Ringway 4, the outermost of the four London ringways that were designed, but never built, in the 1970s. This is one of the original sections of the road to the south of St Albans, viewed from the Napsbury Lane bridge. The Ordnance Survey 6" to 1 mile map of 1925 does not show it, but the 1938 Edition does, which gives a clue at to when it was built.