The A9 is a major road running from the Falkirk council area in central Scotland to Scrabster Harbour, Thurso in the far north, via Stirling, Bridge of Allan, Perth and Inverness. At 273 miles (439 km), it is the longest road in Scotland and the fifth-longest A-road in the United Kingdom. Historically it was the main road between Edinburgh and John o' Groats, and has been called the spine of Scotland.