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Horizontal Curve Safety Treatments

Engineer's, here is our online continuing education course material on Horizontal Curve Safety Treatments from Gregory J. Taylor, PE. You will earn 5 PDH continuing education training hour upon conclusion of the CEU Leaf quiz.

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Course Highlights

The purpose of this course is to encourage you to use this information to evaluate problems and implement appropriate treatments for problem curve locations. These treatments should help reduce roadway departure crashes, injuries, and fatalities.

This course summarizes practical information on where, when, or how to apply safety treatments for horizontal curves or winding sections. These treatments are relatively low cost versus geometric design improvements (degree of curve, shoulders, superelevation, curve length, cross-section, etc.). Information for each treatment generally included description, application guidelines, design elements and materials, effectiveness, and cost. Estimates for treatment effectiveness in reducing crashes were included if available. Actual observed effectiveness values of a treatment can vary depending on its location.

Some of the traffic control devices or treatments presented in this course may be considered to be experimental and not comply with the MUTCD.

Engineer Learning Objectives:

This course is intended to provide you with the following specific knowledge and skills:

Basic Treatments = Devices found in the MUTCD

Enhanced Basic Treatments = Treatments considered to be enhancements to basic devices

Other Traffic Control Device Treatments = Treatments not in the MUTCD which are used by State and local agencies

Rumble Strips = Overview and applications

Minor Roadway Improvements = Low-cost treatments requiring minor roadway or shoulder improvements

Innovative and Experimental Treatments - New treatments that have not been applied extensively

  • Basic Treatments: Centerline markings
  • Basic Treatments: Edge lines
  • Basic Treatments: Horizontal alignment signs
  • Basic Treatments: Advisory Speed Plaque
  • Basic Treatments: One-Direction Large Arrow Sign
  • Basic Treatments: Combination Horizontal Alignment/Advisory Speed Sign
  • Basic Treatments: Curve Speed Sign
  • Basic Treatments: Chevrons
  • Basic Treatments: Delineators
  • Enhanced Treatments: Larger devices
  • Enhanced Treatments: Retroreflective and fluorescent sheeting
  • Enhanced Treatments: Flashing beacons
  • Enhanced Treatments: Profile thermoplastic markings
  • Enhanced Treatments: Raised Pavement Markers
  • Other Treatments: Reflective barrier delineation
  • Other Treatments: Roadside object delineation
  • Other Treatments: Dynamic Curve Warning System
  • Other Treatments: Speed Limit Advisory Marking
  • Rumble Strips: Centerline
  • Rumble Strips: Shoulder
  • Rumble Strips: Roadway
  • Minor Improvements: Paved Shoulder Treatment
  • Minor Improvements: Shoulder drop-off elimination
  • Minor Improvements: Widen shoulder
  • Minor Improvements: Skid-resistive pavement surface
  • Innovative and Experimental Treatments

This is a handout style continuing education PDH class that comprehensively reviews the material.

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Online Format:

     Handout / Attachment

PDH Hours:


Engineer PDH Price: $112.50

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"Your concept of 'online' PE courses is both a timely and reasonably priced alternative. I wish I'd found CEU Leaf years ago."

David G. Gardner, P.E.

SVP (retired), Everett Prescott, Inc.

Gardiner, ME

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