Region: South West/South East
The M4 London to South Wales Motorway.
Holyport to Tormarton
| Section | Construction started | Opened to traffic |
| Tormarton to Stanton St Quintin (J18 to J17) | July 1969 | June 1971 |
| Stanton St Quintin to Wootton Bassett (J17 to J16) | July 1969 | November 1971 |
| Wootton Bassett to Liddington (J16 to J15) | July 1969 | November 1971 |
| Liddington to Wickham (J15 to J14) | December 1969 | December 1971 |
| Wickham to Theale (J14 to J12) | January 1970 | December 1971 |
| Theale to Winnersh (J12 to J10) | January 1970 | December 1971 |
| Winnersh to Holyport (J10 to J8/9) | February 1970 | December 1971 |
| A329(M) Reading and Wokingham Links | September 1971 | ? |
| Sections in the South West Region |
| Sections in the South East Region |