Crawley is a town and borough in West Sussex, England. It is south of Charing Cross, north of Brighton and Hove, and north-east of the county town of Chichester. Crawley covers an area of and had a population of 106,597 at the time of the 2011 Census. The area has been inhabited since the Stone Age, and was a centre of ironworking in Roman times. Crawley developed slowly as a market town from the 13th century, serving the surrounding villages in the Weald. Its location on the main road from London to Brighton brought passing trade, which encouraged the development of coaching inns. A rail link to London opened in 1841. Gatwick Airport, nowadays one of Britains busiest international airports, opened on the edge of the town in the 1940s, encouraging commercial and industrial growth. After the Second World War, the British Government planned to move large numbers of people and jobs out of London and into new towns around South East England. The New Towns Act 1946 designated Crawley as the site of one of these. A master plan was developed for the establishment of new residential, commercial, industrial and civic areas, and rapid development greatly increased the size and population of the town over a few decades. The town contains 13 residential neighbourhoods radiating out from the core of the old market town, and separated by main roads and railway lines. The nearby communities of Ifield, Pound Hill and Three Bridges were absorbed into the new town at various stages in its development. In 2009, expansion was being planned in the west and north-west of the town, in cooperation with Horsham District Council.