From Banbury the M40 crosses into Warwickshire, past Gaydon and on to Leamington Spa. This stretch has the highest share of lorries anywhere on the motorway. Reports for these junctions are shown below.

The junctions on this stretch

• Junction 11 — the A422 and A361 for Banbury, Brackley and Daventry.
• Junction 12 — the B4451 for Gaydon and the British Motor Museum (formerly the Heritage Motor Centre).
• Warwick services — between Junctions 12 and 13, on separate sites for each direction. See Warwick services.
• Junction 13 — the A452 and B4100 for Leamington Spa, Warwick and Gaydon. There is no exit here southbound.
• Junction 14 — the A452 for Leamington Spa and Warwick. There is no exit here northbound.

How busy is this stretch?

M40 Junctions 11 to 14 — Gaydon and Leamington: vehicles a day, stretch by stretch

Stretch	All vehicles	Lorries	Share lorries
J11 to J12	89,483	11,036	12.3%
J12 to J13	88,881	10,226	11.5%
J13 to J14	88,446	8,405	9.5%

© M40Traffic.co.uk · Statistics from the Department for Transport

The three stretches carry almost exactly the same traffic, within about 1,000 vehicles a day. The difference is in the mix: about one vehicle in eight between Banbury and Gaydon is a lorry, 11,036 a day, the most on the M40.

The Department for Transport lists four count points between Junctions 11 and 12. Three share 89,483 and one records 85,425; we show the busier.

Junctions close together

Junctions 13 and 14 both reach Leamington Spa and Warwick on the A452, and the count point between them covers 2.7 kilometres. They are not interchangeable, though: heading north you can leave only at Junction 13, and heading south only at Junction 14. Check the reports above for slip-road closures on the one you need.

For the M40’s freight pattern in full, see M40 lorry and freight traffic.

Previous stretch: Junctions 9 to 11. Next: Junctions 14 to 16, Warwick to the M42.

Traffic count figures on this page are from the Department for Transport road traffic statistics, 2025.