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E – 1759 Effectiveness of Countermeasures for Roadway Departure Crashes

Intended Audience: Traffic engineers and other transportation professionals

PDH UNITS: 1

0 STUDENTS ENROLLED

    In this online engineering PDH course, estimates are discussed of the crash reduction expected if various countermeasures are implemented with respect to roadway departure and other non-intersection crashes. The estimates are presented as Crash Reduction Factors (CRFs). Traffic engineers and other transportation professionals can use the information contained in this course when asking the following types of question: Which countermeasures might be considered along a particular section of a highway that is experiencing a high number of roadway departure crashes? What changes in the number of roadway departure crashes can be expected with the implementation of the various countermeasures? To answer questions like these, in this course CRFs are presented in separate tables for barrier, bridge, geometric, median, roadside, and signs/markings/operational countermeasures.

    This course is based on the document, Toolbox of Countermeasures and Their Potential Effectiveness for Roadway Departure Crashes, FHWA-SA-014 – May 2008, which can be accessed from https://safety.fhwa.dot.gov/ped_bike/tools_solve/ped_tctpepc/

    Learning Objectives

    At the conclusion of this course, you’ll be able to identify and discuss:

    • Define “crash reduction factors”;
    • Identify CRFs for barrier, bridge, geometric, median, roadside, and signs/markings/operational countermeasures;
    • Explain how crash severity and road type are taken into account; and
    • Calculate the 95% confidence interval for the potential CRF that might be achieved by implementing the countermeasure.

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