Safety & Security Major Event Time Series Data
Recent changes to this file by release:
|Release Month||Change Summary||Years in File Affected||More Details for Data Users|
1. FTA has now incorporated data for all years onto one tab for ease of use by data processing systems which pivot along report year. Report Year is added as the first column in each tab. All other data is preserved in its original format.
2. FTA has removed UZA Number which no longer serves a purpose since UACE Code uniquely identifies each Urbanized Area.
The file is ordered by Reporter, Mode, and Type of Service for easy visual comparison of data across years for a given NTD Reporter, Mode, and Type of Service.
As described below, the column for Transit Worker Assaults (Events) includes a derivation of Transit Worker Assaults for years 2022 and prior that is based on the person type and event type.
FTA has added three new columns to reflect Assaults on Transit Workers data collection which is a mandatory data collection effort described in the Bipartisan Infrastructure Law (BIL). The effort, which began in April 2023 introduces Assault on a Transit Worker as a new Major Event Type available to NTD reporters in Report Year (Calendar Year) 2023. A data definition for each new column is provided within.
An Assault on a Transit Worker can be described as a circumstance in which a transit worker is assaulted (for a full definition, please see the NTD Glossary). Consequently, the three new columns provided in the "Events" section are not counts of injuries resulting from assault nor are they the total number of people assaulted. The datasets linked below provide more detail for data users interested in approximating such aggregates.
In years prior to 2023, counts of Assaults on Transit Workers are derived with an estimated 99%+ accuracy using the Person Type of the injured party. Data users should therefore take caution that a very small number of events classified as "Assault Events Involving Transit Workers" do not actually involve an assault against a worker as defined in 2023.
|July 2023||FTA has added the column "UACE" which will, in future months, uniquely identify each Urbanized Area.||ALL YEARS||This allows users to more easily filter to modes operating in a certain Urbanized Area (UZA) regardless of when they operated. In future months, the UZA number previously provided will be replaced with this code.|
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.
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.
|ALL YEARS||These changes are performed to align the reporting periods used in the file and allow for more accurate and precise calculation of rates.|
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
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