Safety & Security Major Event Time Series
Recent changes to this file by release:
| Release Month | Change Summary | Years in File Affected | More Details for Data Users |
| April 2024 | The Time Series will count events which involved an assault or homicide and a collision (e.g., a person injured when pushed into a transit vehicle) in the Security Event columns. Previously, these events may have been counted in the Collision column. This change aligns with existing data handling for Collision events that involve Suicide or Attempted Suicide. | 2023-Present | The Major Safety Events file published to the DOT Open Data Portal has also been updated to account for these events. The Event Type column will now display a converted Event Type (e.g., from Collision to the corresponding Security Event Type, Assault or Homicide). In addition, the Person List field will provide a flag so that users can identify the number people assaulted during the event. |
| February 2024 |
FTA will no longer include 2002-2007 data in this file. These data are still available for data users at the following webpage: |
2002-2007 | FTA has determined this data is not subject to change and is simplifying the steps to refresh the monthly datasets. |
Other 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 https://www.transit.dot.gov/ntd/data-product/safety-security-time-series-data.
- 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: https://data.transportation.gov/Public-Transit/Major-Safety-Events/9ivb-8ae9
- 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.
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