Disclaimer about Using Crash Data

The following is the agreement that every user must accept in order for them to use crash data. Please review it regularly.

The information contained on this web site is compiled from crash reports submitted to the Utah Department of Public Safety with post-processing by the Utah Department of Transportation. The Crash Studies Team at UDOT is committed to providing the highest quality crash data to customers. However, we cannot guarantee that all crashes are represented in the data nor can we ensure that all details pertaining to a single crash are accurate.

This website is provided for the purpose of identifying safety concerns, with the intent of funding low cost safety improvements. When using this data, always reference UDOT as the source with a disclaimer that includes “this data is protected under 23 USC 409.” Never disclose this information, or analysis that uses this data, in reply to any legal action.  UDOTcrash data is protected from discovery and shall not be admitted as evidence in any court.

Overview

Crash Query is for analyzing, exploring, and creating reports using crash data. It is optimized for quick, agile analysis and exploration of data. Below is an introductory video, which explains the Crash Query, Network Screening, and Safety Analysis applications:

Crash Query provides four different ways to view the data:

  1. Map Points View - The points view shows individual crash points colored by severity. Crash points are located based on the lat/long location included in the crash attributes. Any crash without location data is not shown on the map.
  2. Map Segments View - The segments view shows crash rates or crash totals by roadway segment. Data is aggregated to the segment based on the route and milepoint. Crash data without a route/milepoint is not included in a segment.
  3. Table View - The table view shows individual records for each crash, and allows you to view data (columns) for any crash attribute. All crashes are shown in the table.
  4. Chart View - The chart view allows you to build charts using crash attributes. Attributes shown in the charts can be selected from the drop-down menus. Chart data and totals include all crashes.
  5. Stats View - The stats view shows individual charts for all attributes in the crashes and roadway data. Chart data and totals include all crashes.

Settings

The settings menu in crash query includes settings for the segments (heat-map) view. The first setting allows you to select if you are seeing crash rates or raw crash counts. The other setting allows the user to select the minimum segment size. In the heat map view segment sizes adjust based on the users zoom level. When viewing the entire state segments are 10 miles long. As you zoom in they adjust to 5 miles, 2 miles, 1 mile, and 1/2 mile long. If you want to set a minimum segment size, you can do that in the settings menu. Minimum segment size means that the segment lengths will not get smaller than the selected size. For example, if I want to see 5 mile segments but nothing smaller, I select 5 mile segments in the minimum segment size drop-down. If I zoom out segments will adjust to 10 miles, but when I zoom in they will not get smaller than 5 miles.

Download

To download a .csv file (which can be opened in Excel) of crash records, simply navigate to the table view and click the "CSV" button along the bottom. The crashes included in the download will reflect any filters that are currently applied. Vehicle-level data cannot be downloaded, only crash-level data.

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