Complex sentence: Construction on the actual interchange with I-95 will begin in 2013 with the flyover ramps between northbound I-95 and the eastbound turnpike and the westbound turnpike and southbound I-95 to be completed by 2018.
Split into simpler sentences: Construction on the actual interchange with I-95 will begin in 2013. The flyover ramps between northbound I-95 and the eastbound turnpike and the westbound turnpike and southbound I-95 are to be completed by 2018.