Ar fysiau mae 75 y cant o'r holl deithiau ar drafnidiaeth gyhoeddus, ond, ers preifateiddio'r diwydiant bysiau gan y Torïaid yng nghanol yr 1980au, mae nifer y llwybrau wedi crebachu, cyflog y staff wedi'i atal ac mae prisiau wedi codi.
Buses carry 75 per cent of all public transport journeys, but, since the Tory privatisation of the bus industry in the mid-1980s, the number of routes has shrunk, the pay of the staff has been suppressed and fares have risen.