http://www.legislation.gov.uk/uksi/1998/16/article/2/madeThe Chester to Holyhead Trunk Road (A55) (Bryngwran to Holyhead) Order 1998Roads and highwaysRoad buildingCouncil policies and plansKing's Printer of Acts of Parliament2012-09-10HIGHWAYS, ENGLAND AND WALES;WALES2The centre lines of the new trunk roads are indicated by heavy black lines on the deposited plan.