(页面存档备份,存于互联网档案馆) Road Safety Foundation 1815–1830 reports of Select Committees on roads to Holyhead (页面存档备份,存于互联网档案馆) digitised by Enhanced British Parliamentary
Map. [2021-10-20]. (原始内容存档于2021-10-20) (英语). End of the Road for the Great British Drive – UK roads drive motorists to despair. Garmin. 2 March 2009 [2021-10-20]