East Sussex is a county in South East England. It is bordered by the counties of Kent, Surrey, Brighton and Hove and West Sussex, and to the south by the English Channel.
From a geological point of view East Sussex is part of southern anticline of the Weald: the South Downs, a range of moderate chalk hills which run across the southern part of the county from west to east and mirrored in Kent by the North Downs. To the north lie parallel valleys and ridges, the highest of which is the Weald itself (the Hastings beds and Wealden Clay). The sandstones and clays meet the sea at Hastings; the Downs, at Beachy Head.
Unusually East Sussex has no motorways. The main roads through the county are those part of the radial pattern from London: the A21 to Hastings; the A22 to Eastbourne; and the A23 to Brighton. Cross-country routes include the A26 which carries traffic from Newhaven and Lewes north into Kent; and the south coast trunk route, which starts in Folkestone (Kent) as the A259 trunk road, and traverses the south coast to Eastbourne, where it becomes the A27 trunk road and heads westwards towards Chichester in West Sussex and ultimately to Honiton in Devon. All the main roads suffer from congestion and traffic problems: the A27 which connects Eastbourne to Portsmouth is one of the busiest trunk roads in the UK.