Complex sentence: An additional bonus was the creation of a new road between Starr's Point and Canard which ran along the dyke and became known as the Wellington Dyke Road and provided protection for the roads and bridges further upriver.
Split into simpler sentences: An additional bonus was the creation of a new road between Starr's Point and Canard which ran along the dyke and became known as the Wellington Dyke Road. The dyke also provided protection for the roads and bridges further upriver.