The last stretch of the M40 runs from Warwick past Henley-in-Arden to the M42 at Junction 3A, south of Birmingham. Reports for these junctions are shown below.

The junctions on this stretch

• Junction 14 — the A452 for Leamington Spa and Warwick.
• Junction 15 — the A46 and A429 for Warwick, Stratford-upon-Avon, Coventry and Warwick Parkway.
• Junction 16 — the A3400 for Henley-in-Arden.
• M42 Junction 3A — the end of the M40. Traffic continues on the M42 for Birmingham, Solihull, the NEC, the airport, the M1 and the M6.

How busy is this stretch?

M40 Junctions 14 to 16 — Warwick to the M42: vehicles a day, stretch by stretch

Stretch	All vehicles	Lorries	Share lorries
J14 to J15	113,433	9,678	8.5%
J15 to J16	94,041	9,748	10.4%
J16 to M42 J3A	96,672	8,185	8.5%

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

Junction 14 to 15 is the busiest stretch of the M40 outside Buckinghamshire, at 113,433 vehicles a day, with the A46 carrying traffic on to Coventry and Stratford. At the M42 interchange the Department for Transport counts the two link roads separately, at 51,574 and 47,908 a day.

Active Traffic Management

Active Traffic Management is used on the approach to the M42 at the northern end of the M40. The overhead signs there can set the speed limit and open or close lanes; see M40 speed limits now and M40 overhead signs.

The first Birmingham section

Construction of the northern M40 began at Warwick in October 1987. The 12-mile section between the M42 and Warwick opened in December 1989, a little over a year before the rest of the extension was finished.

Beyond the M40

For the M42 round the south and east of Birmingham, see M42 Traffic. For the M6 beyond it, see M6 Traffic.

Previous stretch: Junctions 11 to 14. All stretches: M40 maps.

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