The South Coast Trunk Road is a former designation of a 222-mile (357 km) long route in southern England, sometimes called the Folkestone to Honiton trunk route. ^[1] It is made up of several numbered roads (from west to east):

• the A35 from Honiton ( 50°48′05″N 3°10′58″W / 50.8013°N 3.1829°W / 50.8013; -3.1829 (South Coast Trunk Road (western end))) to Bere Regis ( 50°45′26″N 2°12′42″W / 50.7571°N 2.2118°W / 50.7571; -2.2118)
• the A31 from Bere Regis to Cadnam ( 50°55′04″N 1°35′37″W / 50.9178°N 1.5935°W / 50.9178; -1.5935)
• the M27 from Cadnam to Portsmouth ( 50°50′12″N 1°03′54″W / 50.8366°N 1.0650°W / 50.8366; -1.0650)
• the A27 from Portsmouth to Pevensey ( 50°49′19″N 0°20′33″E / 50.8220°N 0.3425°E / 50.8220; 0.3425)
• the A259 from Pevensey to Brenzett ( 51°00′26″N 0°51′30″E / 51.0071°N 0.8582°E / 51.0071; 0.8582)
• the A2070 from Brenzett to Ashford ( 51°08′12″N 0°54′37″E / 51.1367°N 0.9102°E / 51.1367; 0.9102)
• the M20 from Ashford to Folkestone ( 51°05′41″N 1°09′29″E / 51.0948°N 1.1581°E / 51.0948; 1.1581 (South Coast Trunk Road (eastern end)))