With a view to advancing transportation safety, the TSB is publishing from its Rail Occurrence Database System (RODS) on reportable accidents and incidents (which together are called occurrences) for use by industry and the public. Accidents and incidents are reported in accordance with the TSB Regulations that were in effect at the time of the occurrence. Accident and incident data prior to 1990 are provided on an as-is basis, as they were not collected by the TSB. The data provided in the rail data file is described in the accompanying data dictionary. The RODS datasets are released on or soon after the 15th of each month, and contain data from January 1983 to the last day of the month preceding their release. As many occurrences are not formally investigated by the TSB, information pertaining to some occurrences may not have been validated. Consequently, these datasets are provided on an as-is basis, and the TSB does not warrant their quality, accuracy, reliability or completeness.