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 (50.8013°N 3.1829°W / 50.8013; -3.1829 (South Coast Trunk Road (western end))) to Bere Regis (50.7571°N 2.2118°W / 50.7571; -2.2118)
• the A31 from Bere Regis to Cadnam (50.9178°N 1.5935°W / 50.9178; -1.5935)
• the M27 from Cadnam to Portsmouth (50.8366°N 1.0650°W / 50.8366; -1.0650)
• the A27 from Portsmouth to Pevensey (50.8220°N 0.3425°E / 50.8220; 0.3425)
• the A259 from Pevensey to Brenzett (51.0071°N 0.8582°E / 51.0071; 0.8582)
• the A2070 from Brenzett to Ashford (51.1367°N 0.9102°E / 51.1367; 0.9102)
• the M20 from Ashford to Folkestone (51.0948°N 1.1581°E / 51.0948; 1.1581 (South Coast Trunk Road (eastern end)))