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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Safety & Security Major Event Time Series Data

Update Effective April 2023: The underlying database schema used to produce this file has changed. The specific impacts to the file are: 

  1. Service Data fields used to produce event rates have been changed to use aggregates of calendar year data reported to the NTD on a monthly basis instead of fiscal year data reported on an annual basis. This is to align the reporting periods used in the file and allow for more precise calculation of rates (i.e., on the "Summary" tab).
  2. Train Revenue Miles, Passenger Miles Traveled, and related metrics have been removed from the file. These fields are not collected on a monthly basis. Please note that this impacts the number of columns present in each of the tabs containing NTD data.

Considerations for data users:

  • This time series contains monthly-updated Safety and Security (S&S) information reported by urban Full Reporters for Major Safety and Security Events only. For a total of all events, please see the time series at 
  • FTA is now releasing on a monthly basis the source dataset for this file for all events starting in 2014. This file provides a record for each major event reported to the NTD with some details about the event. Please find the dataset on the DOT Open Data Catalog website: 
  • The Time Series has always counted injuries and fatalities associated with Suicide events in the Suicide column and recently updated the file to perform the same adjustment for Attempted Suicide events as well. These classifications are made to retain consistent data definitions from year to year and there are no net changes in total number of events, injuries or fatalities as a result. In more recent years (2016 to present), the data available in the NTD regarding Suicides is more precise. Therefore, people who are harmed in a suicide-related event who were not reported as attempting suicide are classified according to the reported Person Type (e.g., Passenger, Employee, etc.) while any person identified as a Suicide or Attempted Suicide is counted in the Suicide column.
  • The NTD categorizes collisions which do not involve transit vehicles as Not Otherwise Classified (NOC) event type, rather than Collision event type. The Collisions column in the 2008 through present year tabs excludes collisions not involving a transit vehicle, moving these events to the respective NOC column. This results in a net decrease in collisions and an equal increase in NOC safety events. There are no net changes to the total number of events, injuries or fatalities as a result of this adjustment.
  • This file will be updated periodically by FTA to include data for subsequent months, and to incorporate revisions to prior months in the calendar year made by the transit properties. In some cases, this may include revisions to data from previous years.

Keywords: collision, derailment, fire, security, noc, event, passenger, people waiting or leaving, bicyclist, pedestrian, in cross, not in crossing, operator, employee, other, vehicle occupant, other, trespasser, suicide, safety statistics, security statistics

This document has not been certified as 508 compliant.