I thought they showed it happened once on the drummondville sub?
March 22, 2024 - Ron Bartels, VIA Specialist Director, Engineering emails, "Jacques Luce from CN just called to tell me that they have noticed some potentially inconsistent shunting incidents with some VIA trains. He didn’t have all the details but wants to have a call with VIA next Monday afternoon at 3:00 PM. He mentioned Venture trains and also trains with P42 leading. He said we may need to increase our axle count, but at the moment they don’t have enough info to come to any conclusions." Graphic data from nine crossings had been presented by the National Loss of Shunt Technical Committee: Floating Shunt Phenomenon Overview for VIA Rail dated April 1, 2024. The data was from March 22 (erratic shunt detected) as well as XP-4 grade crossing protection data on March 26 during the passage of VIA No 24 and CN No 121. Importantly, at this time Ventures had been operating on the CN Kingston Subdivision to Coteau since November 2022, and to Toronto since October 2023 without any restrictions from CN. In addition, the restrictions imposed by CN in March, 2024 applied to all VIA trains, not just Venture-equipped trains.
March 28, 2024 - VIA requests additional information regarding restrictions that CN issued for certain grade crossings on the Drummondville Subdivision "DRMV" for all passenger equipment operating with less than 32 axles: at MP 8.16, MP 33.63, MP 40.02, MP 46.07, MP 46.35, MP 51.72, MP 55.66, MP 60.54, MP 60.80, MP 61.83, MP 64.03, MP 74.11 and MP 80.17. A VIA analysis of the CN data subsequently showed that 77 of the 148 occurrences raised as issues by CN were identified at one specific railway crossing on CN’s Drummondville subdivision (MP 40.02). These repetitive occurrences would point to an infrastructure issue that may have been specific to that crossing.
March 29, 2024 - CN responds to a VIA inquiry regarding the Drummondville Subdivision restrictions, stating, “I cannot emphasize enough to you and the rest of VIA Rail this is not a wayside equipment problem. This is a rail-to-wheel interface issue that causes sporadic shunting.”
April 9, 2024 - CN shares a PowerPoint summarizing poor shunting incidents from the Drummondville subdivision and their investigations into loss of shunt incidents in the U.S. as well as data from the Drummondville subdivision documenting 148 short warning events - what CN considered to be short warning times at seven Drummondville Subdivision crossings equipped with XP-4 grade crossing predictors (GCP) from December, 2023 to March, 2024 - the data upon which CN had relied when issuing the 103.1(f) special instructions issued on March 22, 2024. VIA analysis of the data shows that 77 occurred at a single crossing with only one non-compliant. CN did not identify whether warning times were tested for all 49 Drummondville Subdivision crossings or only for the seven identified crossings; compare warning times of VIA trains with those of other rolling stock equipment (such as freight trains), or identify whether warning times involved VIA’s 24-axle Venture trains, its Legacy trains (HEP/LRC), or any other non-VIA trains. This data comprises the only information ever disclosed to VIA relevant to any potential LOS.