Complex sentence: The segment of DN1 that serves the area north of Bucharest was upgraded at the end of 2005; it now has three traffic lanes on each side and two new interchanges at Henri Coandă airport and Otopeni bridge.
Split into simpler sentences: The segment of DN1 that serves the area north of Bucharest was upgraded at the end of 2005. It now has three traffic lanes on each side and two new interchanges at the Henri Coandă Airport and the Otopeni bridge.