For example in Sydney, the letters L (as in L90), E (as in E70) and X (as in 610X or X84).
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An express bus service, the "Metrobús", based on the successful Curitiba model, was built down Avenida Insurgentes, cutting through the city some 20 km from north to south.
And just two express routes, Lake Forest Express and Morrison Express, both serving Eastern New Orleans, have been reinstated so far.
Currently, Irving is served by numerous bus routes and the North Irving Transit Center services Las Colinas with express bus service to downtown Dallas.