Three Mile Cross Interchange

Three Mile Cross Interchange is junction 11 of the M4, a roundabout interchange, connecting to the A33 and B3270.

Redevelopment

The junction went through a major upgrade in 2010. Two new four-lane overbridges were built over the M4 in parallel to the existing bridges, and the old 2-lane bridges converted into a bus lane and a footpath / cycle path. The B3270 was given an unhooked right turn, to allow traffic heading into Reading bypassing the roundabout.

Two new signalised junctions were also constructed to replace a roundabout on the A33 Swallowfield bypass, and the northern approach to the M4 junction redesigned. Huge gantry signs help guide traffic round the junction. A police depot and a Highways Agency compound had to be demolished and relocated to make room for the redesign.

Before the M4 junction, in the late 1950s

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  M4 Junction 11, pre 2010.

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  M4 Junction 11, present day (simplified).

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  M4 Junction 11, present day, with extra detail.

Links

• Plans for the redevelopment of the junction (Reading Borough Council).

legislation.ov.uk

• The M4 Motorway (Theale to Winnersh Section) Connecting Roads Scheme 1968 (Variation) Scheme 2006

Routes

Route	To	Notes
M4	South Wales, Newbury, Oxford (A34), Reading (W)
M4	London, Reading (E)
A33	Reading, Thames Valley University, Green Park, Park and Ride
A33	Basingstoke
B3270	Shinfield, University of Reading (A327), Earley