Na h-Eileanan Siar is a Scottish Council Area.
| Year | All Motor Vehicles | Cars and Taxis | Road Network Total Length |
|---|---|---|---|
| 2000 | 107,800,000 | 80,500,000 | 774.5 miles (1,246.5 km) |
| 2001 | 109,100,000 | 81,600,000 | 775.5 miles (1,248.0 km) |
| 2002 | 110,500,000 | 83,700,000 | 776.2 miles (1,249.2 km) |
| 2003 | 114,500,000 | 86,600,000 | 777.1 miles (1,250.6 km) |
| 2004 | 114,800,000 | 87,700,000 | 774.9 miles (1,247.0 km) |
| 2005 | 108,100,000 | 80,500,000 | 756.9 miles (1,218.1 km) |
| 2006 | 128,100,000 | 94,500,000 | 815.1 miles (1,311.8 km) |
| 2007 | 128,800,000 | 94,100,000 | 815.3 miles (1,312.1 km) |
| 2008 | 126,000,000 | 91,000,000 | 813.6 miles (1,309.3 km) |
| 2009 | 126,300,000 | 89,600,000 | 804.3 miles (1,294.4 km) |
| 2010 | 126,500,000 | 87,700,000 | 806.5 miles (1,297.9 km) |
| 2011 | 126,500,000 | 88,000,000 | 807.0 miles (1,298.7 km) |
| 2012 | 128,300,000 | 92,100,000 | 808.7 miles (1,301.5 km) |
| 2013 | 130,000,000 | 95,900,000 | 808.4 miles (1,300.9 km) |
| 2014 | 134,900,000 | 98,400,000 | 806.4 miles (1,297.7 km) |
| 2015 | 138,500,000 | 100,100,000 | 803.3 miles (1,292.7 km) |
| 2016 | 157,400,000 | 112,900,000 | 800.5 miles (1,288.2 km) |
| 2017 | 148,300,000 | 107,100,000 | 802.4 miles (1,291.3 km) |
| 2018 | 146,200,000 | 105,600,000 | 796.7 miles (1,282.1 km) |
| 2019 | 143,600,000 | 104,000,000 | 794.3 miles (1,278.3 km) |
| 2020 | 113,300,000 | 78,900,000 | 792.4 miles (1,275.3 km) |
| 2021 | 126,300,000 | 86,300,000 | 790.9 miles (1,272.8 km) |
| 2022 | 135,600,000 | 94,700,000 | 791.5 miles (1,273.8 km) |
| 2023 | 138,300,000 | 97,000,000 | 791.9 miles (1,274.4 km) |