Region: North East
A1 Improvement schemes. Micklefield to Boroughbridge
Statistics and options.
| Section | Construction started | Opened to traffic |
| Micklefield By-pass | July 1959 | Dec 1960 |
| Aberford By-pass | October 1961 | 1963 |
| Aberford to Wetherby | April 1963 | 1965 |
| The Wetherby By-pass and Wharfe Bridge | October 1957 | October 1959 |
| Wetherby to Allerton Station | Feb 1959 | August 1960 |
| Hopperton Station Diversion | ? | 1962 |
| Allerton Park Flyover Scheme | July 1969 | 1971 |
| Allerton to Boroughbridge | 1958/59 | November 1960 |