Canol trefi a dinasoedd yw'r llefydd y gall y rhan fwyaf ohonom gerdded iddynt, neu gael trafnidiaeth gyhoeddus ohonynt, a dyma ble mae cyrraedd nifer o lwybrau trafnidiaeth.
Town and city centres are the places most of us can walk to, or get public transport from, and they provide common access points into many transport routes.