Complex sentence: The river, which is the dividing line between West and East Hull, bisects the city's industrial area, and the bridges cause traffic delays during high tides, though river traffic is less than it once was.
Split into simpler sentences: The river, which is the dividing line between West and East Hull, bisects the city's industrial area. The bridges can cause ship traffic delays during high tides, though river traffic is less than it once was.