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Engineering Services

2011 Crash Study


2011 Crash Study Summary

The City of Lincoln conducts Traffic Crash Analyses annually to help plan for safety improvements to the City's roadway infrastructure. Effective safety improvements rely on a careful analysis of traffic crash data. The annual crash study provides quantifiable results that are used to assist decision makers in selecting, prioritizing and implementing safety projects Citywide.

Download the 2011 Crash Report (1.83 M) PDF

Historical Crash Trends

Over the 20-year period ending in 2011, the estimated daily vehicle miles traveled and number of registered vehicles (in Lancaster County) increased annually, while the total number of crashes has decreased. The crash rate has also steadily decreased over the past 20 years for all crash severities.

The City of Lincoln's safety program has resulted in positive benefits and results. This can be attributed to a number of factors:

  • An increase in traffic safety knowledge
  • Improved design standards
  • Improved access management standards
  • Intelligent transportation systems (ITS)
  • Improved safety devices along roadways
  • Implementation of safety improvements
  • Traffic enforcement

Daily Vehicle Miles Traveled & Registered Vehicles vs. Total Crashes

Daily Miles Traveled & Registered Vehicles vs. Total Crashes

2011 Crash Data

During the year 2011 there were 7,673 crashes on the streets of Lincoln. Utilizing this number of crashes and their corresponding severity, a monetary value can be calculated from these events. This value is based upon societal crash cost information included in the Highway Safety Manual (HSM). The table at right summarizes this impact for year 2011.

Year 2011 Crash Costs

Crash Type 2011 Crashes Total Costs
Fatal 10 $52,633,000
Injury 1,740 $186,876,000
PDO 3,810 $35,814,000
NR 2,113 $2,113,000
Total 7,673 $277,436,000

In 2011, 94 intersections were identified as having a high overall crash rate or a specific crash pattern. There were 152 countermeasures recommended and, if implemented, will significantly improve safety and reduce costs to society. The total cost of all countermeasures, if implemented today, is $12.7 million. If all countermeasures were implemented, the overall benefit to cost ratio is estimated at 25:1.

Allstate America's Best Drivers Report

Allstate ranks the largest 200 cities in the United States and releases the information in it's annual Allstate America's Best Drivers Report. The 2011 report rankings are based on reported property damage claims that the company receives over a two-year period. In the eighth annual report, Lincoln ranks fifth, behind Sioux Falls, Boise, Fort Collins, and Madison. Based upon the average of the past eight reports, Lincoln would rank first among its peer cities.

Safety Effectiveness

As part of this year's study, a list was gathered of 33 intersections where countermeasures had been identified and implemented since 2003. Improvements range from low cost (installations of signs) to high cost (total intersection reconstruction). The crash history for each intersection was evaluated before and after the intersection improvements were identified. In summary:

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Engineering Services