Kammala jumla mai zuwa: Hanyar zamani ta A470 ta samo asali ne daga kamfen a cikin shekarun 1970 ta hanyar "Western Mail" don hanya guda da ke haɗuwa da Arewa da Kudu Wales, a cikin jagorancin zuwa
1979 zaben raba gardama na Welsh. Ya yi nasara, kuma a shekarar 1978, Ofishin Wales ya tattauna game da yiwuwar hanya ta hanyar tsakiyar kasar, wanda aka aiwatar a shekara mai zuwa.