Complex sentence: It passed south of the present-day Main Street area of Coatbridge, and the short Dundyvan Branch ran southwards, built to serve coal pits and then extended to serve the Dundyvan Ironworks with a complex of railway transshipment sidings at its termination.
Split into simpler sentences: It passed south of the present-day Main Street area of Coatbridge, from where the short Dundyvan Branch ran southwards. It was built to serve coal pits and then extended to serve the Dundyvan Ironworks with a complex of railway trans-shipment sidings at its termination.