On May 10, 1914, the new DX tower at Rahway was placed into service. Newly elevated tracks 3 and 4 were completed that year between Colonia and North Rahway. In addition, a new station was built at Linden. The new northbound tracks at Linden opened on July 9, 1914. In 1915, the six tracking of the line between South Elizabeth and Colonia was completed, including grade separation work in Rahway and Linden. On July 11, 1915, the westbound platforms at Rahway and the flying junction with the Perth Amboy Branch were completed. The new Rahway station was completed on December 1, 1915.