Swansea is a Welsh Unitary Authority.
| Year | All Motor Vehicles | Cars and Taxis | Road Network Total Length |
|---|---|---|---|
| 2000 | 934,200,000 | 786,400,000 | 720.0 miles (1,158.8 km) |
| 2001 | 946,400,000 | 795,400,000 | 721.5 miles (1,161.2 km) |
| 2002 | 989,300,000 | 832,300,000 | 723.2 miles (1,163.9 km) |
| 2003 | 998,900,000 | 835,800,000 | 724.7 miles (1,166.3 km) |
| 2004 | 1,023,300,000 | 854,400,000 | 728.3 miles (1,172.1 km) |
| 2005 | 1,025,500,000 | 853,100,000 | 730.4 miles (1,175.4 km) |
| 2006 | 1,041,700,000 | 865,900,000 | 733.5 miles (1,180.5 km) |
| 2007 | 1,054,900,000 | 871,500,000 | 734.0 miles (1,181.3 km) |
| 2008 | 1,034,000,000 | 850,800,000 | 733.2 miles (1,180.0 km) |
| 2009 | 1,011,400,000 | 835,900,000 | 732.5 miles (1,178.8 km) |
| 2010 | 1,000,900,000 | 825,400,000 | 733.4 miles (1,180.3 km) |
| 2011 | 1,013,800,000 | 837,700,000 | 733.7 miles (1,180.7 km) |
| 2012 | 1,014,100,000 | 840,600,000 | 731.0 miles (1,176.5 km) |
| 2013 | 1,026,600,000 | 851,100,000 | 730.2 miles (1,175.2 km) |
| 2014 | 1,058,800,000 | 874,200,000 | 730.4 miles (1,175.4 km) |
| 2015 | 1,080,200,000 | 887,100,000 | 728.0 miles (1,171.5 km) |
| 2016 | 1,108,100,000 | 907,400,000 | 727.8 miles (1,171.2 km) |
| 2017 | 1,115,700,000 | 911,300,000 | 724.6 miles (1,166.1 km) |
| 2018 | 1,128,200,000 | 917,300,000 | 726.0 miles (1,168.4 km) |
| 2019 | 1,140,700,000 | 935,200,000 | 725.2 miles (1,167.0 km) |
| 2020 | 906,600,000 | 719,500,000 | 726.6 miles (1,169.3 km) |
| 2021 | 1,027,800,000 | 815,300,000 | 725.6 miles (1,167.7 km) |
| 2022 | 1,108,000,000 | 884,300,000 | 727.3 miles (1,170.4 km) |
| 2023 | 1,117,600,000 | 900,400,000 | 728.1 miles (1,171.8 km) |