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Definition: The part of the road that carries vehicles.
Notes: Dyma’r term technegol a’r ffurf a ddefnyddir yn y ddeddfwriaeth. Mewn cyd-destunau mwy cyffredinol, argymellir y ffurf “lôn gerbydau”, oni bai bod y testun hefyd yn cyfeirio at “lanes” (“lonydd”) ar y gerbytffordd.
