Complex sentence: Immediately after, SR 905 turns south to its final interchange at Siempre Viva Road before the route ends at the Otay Mesa Port of Entry, which truck traffic must use to cross the border.
Split into simpler sentences: Immediately after, SR 905 turns south to its final interchange at Siempre Viva Road. Following this, SR 905 ends at the Otay Mesa Port of Entry, which truck traffic must use to cross the border.