English: express bus service
Welsh: gwasanaeth bysiau cyflym
Subject: Trafnidiaeth
Welsh definition: An express bus service can be a local (less than 15 miles) or a longer (more than 15 miles) bus service. It has more stops than an express coach service would have, but less than a local bus service.
Notes: Cymharer â'r diffiniadau ar gyfer gwasanaeth bysiau lleol, gwasanaeth bysiau pellter hir, a gwasanaeth coestys cyflym.