| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|---|---|---|---|---|---|---|---|
| 5550 | T-1 | 4-4-4-4 | 4'-8½" | PRR | The T-1 Trust, Dennison, OH | under construction | T1 Trust | More info Construction started in 2014. To be completed by 2030 and become the 53rd of the T-1 class. 5550 will burn oil, be equipped with MU capability, have a wheel-slip alarm, have positive train control, and use Franklin Type B2 rotary-cam poppet valves. |