Editing Franconia Train Wreck of 2025 (section)

== Investigation ==
The Pine Island and Bridgewater Railway '''''immediately''''' launched an investigation into the derailment. The signal system was tested and found to be functioning properly with the correct indications displayed. This was confirmed by the onboard camera on the ASER locomotive; ASER is the only railroad in New Territories that equips its locomotives with such technology. With this information, the PIBR determined that the accident was caused by the ASER crew's failure to obey the wayside signals protecting the rear of B221.

Contributing to the collision was the lack of a train protection system on the track where the collision occurred. As of November 2025, PIBR is actively installing Inductive Intermittent Automatic Train Stop (IIATS) technology on the Wolf River District, which will automatically trigger the emergency brakes on a train should it pass a stop signal.