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 the Mayor's Transport Strategy was published, which includes a proposal for this 'orbital' connection to Old Oak between Hounslow and Brent Cross. The London Mayor's Transport Strategy (MTS), published on 28 February 2018 and ratified by the London Assembly on 8 March 2018, includes plans for a West London Orbital railway line under Proposal 88. The mayor’s proposal for the service highlights that utilising new and existing orbital connections in west London could also improve public transport connections in the city centre. It reads: “Most Londoners want to move around London – rather than in and out of the centre