immediate action to cut air pollution, following a case brought by environmental lawyers at ClientEarth. Cycle infrastructure The National Cycle Network, created by the charity Sustrans, is the UK's major network of signed routes for cycling. It uses dedicated bike paths as well as roads with minimal traffic, and covers 14,000 miles, passing within a mile of half of all homes. Other cycling routes such as The National Byway, the Sea to Sea Cycle Route and local cycleways can be found across the country. Segregated cycle paths are being installed in some cities in the UK such as London, Glasgow, Manchester, Bristol, Cardiff for example. In London Transport for London has installed Cycleways. Road passenger transport Buses Local bus services cover the whole country. Since deregulation the majority (80% by the late 1990s) of these local bus companies have been taken over by one of the "Big Five" private transport companies: Arriva, FirstGroup, Go-Ahead Group, National Express and Stagecoach Group. In Northern Ireland coach, bus (and rail) services remain state-owned and are provided by Translink. Coaches Coaches provide long-distance links throughout the UK: in England and Wales the majority of coach services are provided by National Express. Flixbus and Megabus run no-frills coach services in competition with National Express, the latter's services in Scotland are operated in co-operation with Scottish Citylink. BlaBlaBus also operate to France and the Low Countries from London. Road freight transport In 2014, there were around 285,000 HGV drivers in the UK and in 2013 the trucking industry moved 1.6 billion tonnes of goods, generating £22.9 billion in revenue. Water transport Due to the United Kingdom's island location, before the Channel Tunnel the only way to enter or leave the country (apart from air travel) was on water, except at the border between Northern Ireland and the Republic of Ireland. Ports and harbours About 95% of freight enters the United Kingdom by sea (75% by value). Three major ports handle the most freight traffic: Grimsby & Immingham on the east coast. Port of London, on the River Thames. Milford Haven, in south-west Wales. There are many other ports and harbours around the United Kingdom, including the following: Aberdeen, Avonmouth, Barrow, Barry, Belfast, Boston, Bristol, Cairnryan, Cardiff, Dover, Edinburgh/Leith, Falmouth, Felixstowe, Fishguard, Glasgow, Gloucester, Grangemouth, Grimsby, Harwich, Heysham, Holyhead, Hull, Kirkwall, Larne, Liverpool, Londonderry, Manchester, Oban, Pembroke Dock, Peterhead, Plymouth, Poole, Port Talbot, Portishead, Portsmouth, Scapa Flow,