| Location | Wilton, CT |
| Information | |
| Metro North Railroad (former New York New Haven and Hartford Railroad) | |
| Active Train Order office with operating TO semaphore | |
| Semaphore style: Union Switch & Signal Co. | |
| Mechanically operated 3 light 60 degree lower quadrant semaphore (casting C.I. Pat No. 9761) | |
| NOTE: This might be the last operating TO semaphore in regular mainline service. | |
| Information and photographs kindly provided by Joe Sanfilippo. |