Gwynedd is a Welsh Unitary Authority.
| Year | All Motor Vehicles | Cars and Taxis | Road Network Total Length |
|---|---|---|---|
| 2000 | 699,400,000 | 562,400,000 | 1,510.0 miles (2,430.1 km) |
| 2001 | 708,200,000 | 570,800,000 | 1,511.9 miles (2,433.1 km) |
| 2002 | 732,900,000 | 587,000,000 | 1,513.6 miles (2,435.8 km) |
| 2003 | 754,000,000 | 605,100,000 | 1,515.3 miles (2,438.7 km) |
| 2004 | 762,400,000 | 610,700,000 | 1,517.5 miles (2,442.2 km) |
| 2005 | 780,600,000 | 619,600,000 | 1,518.6 miles (2,443.9 km) |
| 2006 | 809,600,000 | 644,500,000 | 1,572.5 miles (2,530.7 km) |
| 2007 | 798,700,000 | 621,800,000 | 1,573.2 miles (2,531.8 km) |
| 2008 | 804,700,000 | 629,200,000 | 1,572.3 miles (2,530.4 km) |
| 2009 | 797,200,000 | 626,800,000 | 1,562.3 miles (2,514.3 km) |
| 2010 | 789,700,000 | 618,100,000 | 1,561.7 miles (2,513.3 km) |
| 2011 | 781,900,000 | 613,100,000 | 1,560.3 miles (2,511.0 km) |
| 2012 | 772,300,000 | 603,300,000 | 1,560.9 miles (2,512.1 km) |
| 2013 | 782,600,000 | 608,400,000 | 1,565.5 miles (2,519.5 km) |
| 2014 | 801,000,000 | 620,700,000 | 1,564.3 miles (2,517.4 km) |
| 2015 | 821,700,000 | 635,200,000 | 1,563.8 miles (2,516.7 km) |
| 2016 | 854,300,000 | 655,600,000 | 1,565.7 miles (2,519.8 km) |
| 2017 | 877,200,000 | 672,000,000 | 1,564.4 miles (2,517.7 km) |
| 2018 | 881,200,000 | 671,400,000 | 1,555.8 miles (2,503.9 km) |
| 2019 | 882,400,000 | 673,800,000 | 1,553.1 miles (2,499.5 km) |
| 2020 | 656,100,000 | 484,600,000 | 1,552.9 miles (2,499.1 km) |
| 2021 | 744,200,000 | 546,700,000 | 1,552.0 miles (2,497.7 km) |
| 2022 | 834,900,000 | 620,300,000 | 1,559.6 miles (2,509.9 km) |
| 2023 | 853,100,000 | 641,200,000 | 1,560.7 miles (2,511.6 km) |