After the opening of the connecting line to Gary from Woodville in 1912, the "Air Line" service comprised a through run from Hammond to La Porte via Gary, and used the four cars 101 to 104. This was semi-fast, dovetailed to run in between local services, and had a 15-minute layover at the main interurban station at Gary which was at 11th and Broadway. The total time taken to get to La Porte from Hammond was two and a half hours. The New York Central Railroad ran from Indiana Harbor, just north of Hammond, to La Porte in one and three quarter hours.