Claim: There is only one single-digit A road in Zone 8 of the Great Britain numbering scheme; A8.
Evidence: The A8 is a major road in Scotland, connecting Edinburgh to Greenock via Glasgow. A8 Greenock Edinburgh 25-mile gap between Newbridge and Newhouse List of A roads in zone 8 in Great Britain starting north of the A8 and west of the A9 (roads beginning with 8).