M25 motorway and Thurrock off junction 31 (to the east of London). Cobham services opened on 13 September 2012. Originally, the M25 was unlit except for sections around Heathrow, major interchanges and Junctions 23–30. Originally, low pressure sodium (SOX) lighting was the most prominent technology used, but widening projects from the 1990s onwards have all used high-pressure sodium (SON) lighting and this has diminished the original installations. By 2014 only one significant stretch was still SOX-lit (Junction 25–26) and the units were removed the same year. The motorway passes through five counties. Junctions 1A–5 are in Kent, 6–14 are in Surrey, 15–16
West London Orbital including by Modern Railways magazine and the independent blogging community A number of routes have previously been examined for new orbital tube lines and improved connectivity across West and North London. It was considered that the most likely route of the previous proposal would be a north-south route running from Brent Cross to Surbiton, via Wembley Park, Ealing Broadway, Richmond and Kingston fully underground, connecting several London Underground and National Rail lines, including the forthcoming Crossrail 1 at Ealing Broadway. The proposal envisaged an underground driverless light rail train system similar to the Docklands Light Railway, and updated "to the