The A413 is a major road in England that links Gerrards Cross to Towcester. It passes through various towns and villages including Buckingham, Aylesbury, Wendover, Winslow, Great Missenden and Amersham.It has been diverted a number of times over the last 50 years. In the 1960s, a by-pass was built around Great Missenden and re-routing has taken place through Aylesbury town centre. In the last 20 years, by-passes have been built for Amersham and Wendover.