Midlothian is a Scottish Council Area.
| Year | All Motor Vehicles | Cars and Taxis | Road Network Total Length |
|---|---|---|---|
| 2000 | 371,000,000 | 305,300,000 | 389.9 miles (627.5 km) |
| 2001 | 374,900,000 | 307,800,000 | 390.7 miles (628.7 km) |
| 2002 | 376,600,000 | 308,200,000 | 391.2 miles (629.6 km) |
| 2003 | 380,900,000 | 308,500,000 | 391.8 miles (630.5 km) |
| 2004 | 374,700,000 | 302,800,000 | 372.9 miles (600.2 km) |
| 2005 | 376,300,000 | 302,500,000 | 374.5 miles (602.7 km) |
| 2006 | 383,800,000 | 307,300,000 | 393.8 miles (633.8 km) |
| 2007 | 389,200,000 | 307,600,000 | 396.9 miles (638.8 km) |
| 2008 | 388,900,000 | 309,100,000 | 397.2 miles (639.3 km) |
| 2009 | 396,200,000 | 316,200,000 | 405.8 miles (653.0 km) |
| 2010 | 397,000,000 | 317,100,000 | 407.8 miles (656.3 km) |
| 2011 | 398,200,000 | 318,300,000 | 410.6 miles (660.8 km) |
| 2012 | 395,100,000 | 315,500,000 | 413.4 miles (665.3 km) |
| 2013 | 392,700,000 | 313,200,000 | 416.3 miles (670.0 km) |
| 2014 | 408,800,000 | 324,700,000 | 418.6 miles (673.7 km) |
| 2015 | 412,700,000 | 326,200,000 | 423.7 miles (681.9 km) |
| 2016 | 428,300,000 | 334,500,000 | 427.4 miles (687.8 km) |
| 2017 | 441,800,000 | 342,000,000 | 424.6 miles (683.4 km) |
| 2018 | 441,100,000 | 344,700,000 | 427.3 miles (687.6 km) |
| 2019 | 441,100,000 | 343,600,000 | 429.9 miles (691.9 km) |
| 2020 | 343,600,000 | 257,400,000 | 431.0 miles (693.7 km) |
| 2021 | 391,600,000 | 291,800,000 | 433.8 miles (698.1 km) |
| 2022 | 420,300,000 | 316,500,000 | 439.9 miles (708.0 km) |
| 2023 | 426,000,000 | 322,600,000 | 442.2 miles (711.7 km) |