Complex sentence: The physical roadway continues north as an at-grade city street, S. Jefferson St. S. Jefferson St. is signed as US 340 within the city limits of Frederick, even though the route terminates prior to the beginning of the street.
Split into simpler sentences: The physical roadway continues north as an at-grade city street, South Jefferson Street. South Jefferson Street is signed as US 340 within the city limits of Frederick, even though the route terminates prior to the beginning of the street.