Complex sentence: Instead of entering Laurel at 7th St., MD 216 crossed the Patuxent River over a now-defunct bridge at 9th St. Between the 1950s and 19xx, MD 216 continued south on 9th St. to its terminus at MD 198.
Split into simpler sentences: Instead of entering Laurel at 7th Street, MD 216 crossed the Patuxent River over a now-defunct bridge at 9th Street. For some time after this path changed in the 1950s, MD 216 continued south on 9th Street to a terminus at MD 198.