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
Public transport in the London Borough of Havering Public transport in the London Borough of Havering Public transport in the London Borough of Havering, in northeast London, England, is a mix of National Rail, London Underground, London Overground and Crossrail and London Buses services. Rail services are primarily radial to central London with bus services providing most of the orbital connections. The public transport authority is Transport for London and the local authority is Havering London Borough Council. Several railway lines cross the borough running radial to central London. The Great Eastern Main Line has stations at Romford, Gidea Park and Harold Wood, with TfL Rail and Abellio