thumb|right|Looking towards the A308(M) terminus with the A308 and A330.
The A308(M) is a motorway in Berkshire, England. It is long. It forms part of the Maidenhead bypass and runs from the M4 at junction 8/9 to the A308 south of Maidenhead town centre. The A308(M) is generally considered to be Britain's second shortest motorway, after the A635(M) on the Mancunian Way.
History
In 1961 the A4(M) was opened and ran from the existing junction 7, through a junction with the A308 and ending at a junction with the A4. In 1963, the Slough bypass was opened
|-
! Eastbound exits
! Junction
! Westbound exits
|- align="center"
|Road continues as A308 to Maidenhead, Windsor <br> A330 to Ascot and Bracknell (A3095)
| rowspan="2"| A308 & A330 <br>Terminus
| London, Reading (M4) A308(M), Oxford A404(M)
|- align="center"
| Maidenhead, Windsor A308, Ascot A330, Bracknell A3095
| Start of motorway
|- align="center"
| Start of motorway <br> Maidenhead (Central) A308(M)
| M4 J8/9 <br> A404(M)
| The West M4(W), London M4(E) <br> High Wycombe A404(M)
|}
See also
- List of motorways in the United Kingdom
- A404(M) motorway