| Site | Type | Grid Ref |
|---|---|---|
| A458 | ||
| Tal Cefn | milestone | SH937139 |
| Wern | milestone | SH965125 |
| Pont Twrch | milestone | SH980120 |
| Llanerfyl | milestone | SJ033097 |
| Cyfronydd | milestone | SJ147076 |
| A458 junction B4385 | milestone | SJ157066 |
| A470 | ||
| Ffridfawr | milestone | SH855031 |
| Llanbrynmair | milestone | SH899028 |
| Taloddis | milestone | SN934999 |
| Misc | ||
| Glanhafon | milepost | SJ066259 |
