Horizontal Curve Safety
Credit: 3 PDH
Subject Matter Expert: Mark Knarr, P.E., CEM, LEED AP BD+C, PMP, CCEA, GPCP
In Horizontal Curve Safety, you'll learn ...
- What are horizontal curve treatments and how they save lives
- Basic treatments found in the MUTCD, as well as enhancements to the basic MUTCD devices
- New and innovative horizontal curve treatments that are still considered experimental
- Six (6) maintenance activities that are critical to retaining the effectiveness of horizontal curve treatments
Horizontal curves are those that change the alignment or direction of the road (as opposed to vertical curves, which change the slope). More than 25% of fatal crashes are associated with a horizontal curve, and the vast majority of these crashes are roadway departures. A roadway departure crash is defined as a non-intersection crash which occurs after a vehicle crosses an edge line or a center line, or otherwise leaves the traveled way.
The average crash rate for horizontal curves is about three times that of other types of highway segments. About three-quarters of curve-related fatal crashes involve single vehicles leaving the roadway and striking trees, utility poles, rocks, or other fixed objects—or overturning.
Most roadway departure countermeasures are effective when applied specifically at horizontal curves. A focus on horizontal curves can prove to be a cost-effective approach to reducing roadway departure crashes. Many of these countermeasures are low-cost and can be installed at prioritized horizontal curves to address safety issues.
The purpose of this course is to provide practical information about low-cost treatments that can be applied at horizontal curves to address actual or potential safety problems. The target audience is civil and transportation engineers who are involved with roadway construction, repair, or maintenance.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- Basic treatments listed in the Manual on Uniform Traffic Control Devices (MUTCD) for horizontal curves
- Devices that enhance the basic treatments
- Other treatments used by State and local agencies that aren’t listed in the MUTCD
- Rumble strips applied to centerlines, edge lines, shoulders, and transversely across the lane
- Relatively low-cost treatments that require minor improvements to the roadway or shoulder
- Innovative and experimental methods that have not been applied extensively
- Simple, effective maintenance
Certificate of Completion
You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 20 questions. PDH credits are not awarded until the course is completed and quiz is passed.
|This course is applicable to professional engineers in:|
|Alabama (P.E.)||Alaska (P.E.)||Arkansas (P.E.)|
|Delaware (P.E.)||Florida (P.E. Area of Practice)||Georgia (P.E.)|
|Idaho (P.E.)||Illinois (P.E.)||Illinois (S.E.)|
|Indiana (P.E.)||Iowa (P.E.)||Kansas (P.E.)|
|Kentucky (P.E.)||Louisiana (P.E.)||Maine (P.E.)|
|Maryland (P.E.)||Michigan (P.E.)||Minnesota (P.E.)|
|Mississippi (P.E.)||Missouri (P.E.)||Montana (P.E.)|
|Nebraska (P.E.)||Nevada (P.E.)||New Hampshire (P.E.)|
|New Jersey (P.E.)||New Mexico (P.E.)||New York (P.E.)|
|North Carolina (P.E.)||North Dakota (P.E.)||Ohio (P.E. Self-Paced)|
|Oklahoma (P.E.)||Oregon (P.E.)||Pennsylvania (P.E.)|
|South Carolina (P.E.)||South Dakota (P.E.)||Tennessee (P.E.)|
|Texas (P.E.)||Utah (P.E.)||Vermont (P.E.)|
|Virginia (P.E.)||West Virginia (P.E.)||Wisconsin (P.E.)|