Holyport Interchange

Holyport Interchange is Junction 8/9 of the M4.

It is a simple roundabout interchange with the A404(M) (the rump part of the Maidenhead Bypass) and the A308(M) (a link made due to the closure of junction 8 when the M4 was extended from part-way along the existing motorway and the new junction to tie in the bypassed section was deemed too close to junction 8).

Under plans to widen the M4 in the 1990s, the Highways Agency spoke of "lower level improvements" planned for this interchange, which would involve purchasing land to the south. That plan was eventually dropped, and due to congestion at this junction, the sliproads were widened in around 2007.

Under one plan for Maidenhead services, it would have been to the south of the junction, accessed from it.

Routes

Route	To	Notes
M4	The WEST, South Wales, Reading
M4	London, Windsor, Slough
A308(M)	Maidenhead (Central)
A404(M)	High Wycombe, Henley, Maidenhead (West)
A423(M)	Oxford, Henley, Maidenhead (West)