sentences:  State Route 578 begins at the Interstate 15 (I-15) and U.S. Route 93 (US 93) interchange with Washington Avenue, D Street and City Parkway (exits 43 and 44).From there, it follows Washington Avenue eastward, traveling under the Union Pacific Railroad tracks to intersect Main Street.SR 578 passes by the southern Nevada district headquarters of the Nevada Department of Transportation as it heads eastward.