New Safety Tool Features Speed Data

SEMCOG’s newly adopted Transportation Safety Plan highlights the need for safer speeds. To better track progress, SEMCOG has purchased historical vehicle speed data (2019-22) along with access to a new safety tool known as “ClearGuide Safety.”

Produced by Iteris Inc., this is a web-based software that provides querying capabilities to display maps and data at road segment-levels for three types of speed data:

1. Percent of speeding vehicles over the speed limit by user-defined speed thresholds
   • (For example, percent of vehicles over the speed limit by 10, 15, or 20 mph, etc.),
2. percentile speeds, and
3. speed limit.

This tool also allows users to analyze and compare the speeding or percentile speed data by time of day, day of week, time of day plus day of week combinations, and user-defined routes. Reports and charts can be generated and exported in various formats. Technicians and planners can conduct before and after analyses on vehicle speeding hotspots where speed reduction countermeasures have been deployed.

Early access to the tool is now available to our members and partners by contacting Sayeed Mallick or Saima Masud. Additional information and training opportunities will be shared soon, so be sure to keep an eye on your inbox.

This snapshot of the Iteris Clear Guide Safety module depicts the percentage of vehicles over the speed limit by 10 mph or more, between 10 pm to 5 am for all weekdays during the month of June 2023. The Lodge (M-10), Southfield (M-39) and portions of I-96 and I-94 have larger percentages of vehicles speeding.