Isles of Scilly is an English Unitary Authority. It was created in April 2009.
| Year | All Motor Vehicles | Cars and Taxis | Road Network Total Length |
|---|---|---|---|
| 2000 | 1,600,000 | 1,000,000 | 22.7 miles (36.5 km) |
| 2001 | 1,700,000 | 1,100,000 | 22.7 miles (36.5 km) |
| 2002 | 1,600,000 | 1,100,000 | 22.7 miles (36.6 km) |
| 2003 | 1,700,000 | 1,100,000 | 22.8 miles (36.7 km) |
| 2004 | 1,700,000 | 1,100,000 | 21.6 miles (34.8 km) |
| 2005 | 1,400,000 | 900,000 | 21.6 miles (34.8 km) |
| 2006 | 1,500,000 | 900,000 | 23.7 miles (38.1 km) |
| 2007 | 1,500,000 | 800,000 | 23.7 miles (38.1 km) |
| 2008 | 1,500,000 | 800,000 | 23.7 miles (38.1 km) |
| 2009 | 1,500,000 | 800,000 | 23.7 miles (38.1 km) |
| 2010 | 1,500,000 | 800,000 | 22.8 miles (36.7 km) |
| 2011 | 1,500,000 | 900,000 | 22.8 miles (36.7 km) |
| 2012 | 1,400,000 | 900,000 | 22.8 miles (36.7 km) |
| 2013 | 1,500,000 | 900,000 | 22.9 miles (36.9 km) |
| 2014 | 1,500,000 | 900,000 | 22.9 miles (36.9 km) |
| 2015 | 1,600,000 | 900,000 | 22.9 miles (36.9 km) |
| 2016 | 1,600,000 | 900,000 | 21.4 miles (34.5 km) |
| 2017 | 1,600,000 | 900,000 | 21.7 miles (34.9 km) |
| 2018 | 1,600,000 | 900,000 | 21.5 miles (34.6 km) |
| 2019 | 1,500,000 | 800,000 | 21.5 miles (34.6 km) |
| 2020 | 1,200,000 | 600,000 | 21.4 miles (34.5 km) |
| 2021 | 1,200,000 | 700,000 | 21.2 miles (34.2 km) |
| 2022 | 1,300,000 | 800,000 | 21.2 miles (34.2 km) |
| 2023 | 1,400,000 | 800,000 | 21.2 miles (34.2 km) |