 U.S. Route 20 also enters the county on the Dunn Memorial Bridge and travels west through Albany (city) and the Town of Guilderland.New York State Route 5 and New York State Route 7 are two important highways that bisect the county and are developed as important shopping strips.Albany County is served by the Capital District Transportation Authority, a four-county bus service that also serves Rensselaer, Schenectady, and Saratoga counties.