A4084 (Cemmaes Road - Mallwyd)
|From:||Cemmaes Road (SH821045)|
|Distance:||6 miles (9.7 km)|
|Now part of:||A470|
|Route outline (key)|
The road along the Dovey Valley between Cemmaes Road and Mallwyd was originally numbered A491. However, in 1935, most of the A491 was swallowed up by an extension of the A458. The remnant was renumbered A4084.
In the 1970s, the A470 route was extended, taking over the entire route of the A4084. It remains that number.