| Year | Change |
| 1902 | Dayton, Covington and Piqua Traction Company opens line between Dayton and West Milton on June 26, 1902. |
| 1902 | Cincinnati, Dayton and Toledo opens line from Groesbeck Rd to Spring Grove Ave in Cumminsville |
| 1903 | Dayton and Western Traction Company opened line between Eaton and Richmond on January 1, 1903. |
| 1903 | Dayton and Western Traction Company opened line between New Westville and New Paris on January 1, 1903. |
| 1903 | Western Ohio connected to Dayton and Troy on June 6, 1903 -- completes line between Piqua and Lima. |
| 1903 | Dayton, Covington and Piqua Traction Company opens line between West Milton and Piqua on November 1, 1903. |
| 1903 | Dayton Springfield and Urbana Electric Railway completes line from Urbana to Bellefontaine on December 17, 1903. (Full service when sinkhole filled up following summer) |
