Transportation Reports

10-Year Traffic Count Report

The information in the 10-Year Traffic Count Report (PDF) is sorted by the road name, location and intersection. The data was collected over a 24-hour period, during midweek and typically in the summer.  This report shows counts up to 2015.

Traffic count data may also be downloaded from the ArcGIS Hub.

Crash Analyses and Data

2015 Roadway Crash Analysis
A comprehensive evaluation of roadway and intersection crashes in unincorporated Jefferson County was completed as part of the 2015 Safety Improvement Program. This analysis assisted Jefferson County Transportation and Engineering with recommending specific improvements to reduce the frequency and severity of crashes on county roadways.

View the 2015 Crash Analyses (PDF). To obtain copies of individual crash reports in Jefferson County, contact the Colorado State Patrol at 303-273-1616.

Interactive Crash Map
It is Jefferson County’s goal to reduce overall crashes in the county using available resources to make road safety improvements in locations where crashes are most frequent and / or severe. However, the process of identifying, evaluating, and planning safety improvements on public roads is a difficult task.

Beginning with identifying where vehicular crashes have occurred, analysis goes much further to include in-depth safety assessments focusing on the nature of crashes in problem areas. This analysis is necessary to understand the totality of a problem which includes not only individual crashes, but other factors such as road conditions and characteristics, weather, and driving behavior related to all crashes. The results of the assessments are used to identify how best to mitigate the safety problem.

While not intended for in-depth analysis, this interactive application was produced to visually display the 55,000+ crash records in Jefferson County between 2011 and 2015. It does not provide the analysis required to make road safety improvement decisions, but simply allows users to explore data from available crash records from a location perspective. 

View the interactive crash map.

Jefferson County Volume & Capacity Ratio Map

The 2012 and 2035 Volume/Capacity Ratio Maps (PDF) show the level of congestion for Jefferson County and Colorado Department of Transportation (CDOT) roadways. A volume to capacity ratio measures the amount of traffic on a given roadway relative to the amount of traffic the roadway was designed to accommodate. 

Congestion levels for this Jefferson County analysis are defined below:

  • Low congestion - volume/capacity ratio of 0.8 to 0.99
  • Moderate congestion - volume/capacity ratio of 0.9 to 0.99
  • Heavy congestion - volume/capacity ratio of 1.0 to 1.29
  • Severe congestion - volume/capacity ratio of greater than 1.30