Complex sentence: The height of ships serving the port is limited by the Bayonne Bridge over Kill Van Kull, a limitation that will become more serious when the Panama Canal expansion project opens, allowing bigger, new Panamax ships to reach the port from Asia.
Split into simpler sentences: The height of ships serving the port is limited by the Bayonne Bridge over Kill Van Kull. The canal expansion allows bigger, new Panamax ships to reach the port from Asia.