|Location Map ( geo)|
|Approaching the junction from the east|
|Fork with spur leading to trumpet + Dumbell|
|M40 (junctions 8 & 8A), A40, A418|
|Junctions related to the A418|
History and Description
The junction was originally a temporary motorway terminal, where eastbound traffic had a single offslip from the A40 dual carriageway to the bypassed A40 to the east of the junction, and westbound motorway restrictions ended without a junction. The current junction 8 was created by diverting the A40 northbound onto a previously unclassified road to meet the A418, and constructing a fork for free-flowing access between London and Oxford, with the M40 mainline heading north west from the remaining spot.
The current junction 8A was originally numbered as part of '8', though this wasn't always shown on maps. It originally consisted of a north-facing half-diamond onto the A418, with emergency access available to the south via a pair of gates, one of which still exists on the A418. When Oxford services were built, the junction was converted into a full-access dumbell and renumbered '8A'.
The trumpet interchange at the end of the spur, with the A418 and A40 was built in the 1960s when the A40 was upgraded east of Oxford. Due to its age and it not originally being a motorway junction, the junction has tight slip roads, especially linking to the westbound carriageway.
|London, High Wycombe|
|Thame, Aylesbury, Tiddington|
|London (M40), Wallingford (A329), Milton Common, Tetsworth|
|Oxford services||off junction 8A|
|Waterstock Golf Club||off junction 8A|