COURSE DESCRIPTION:

This course provides proven methodology for the safety performance of geometric design decisions for multilane highways in a like manner to that of predicting capacity and level of service based upon large scale definitive research. The crash prediction models for total crashes based upon lane width, shoulder width, roadside hazard, traffic volume (exposure) and other characteristics are presented. Examples of safety performance prediction are presented for highway segments and intersections.

Discussion of research and the interactive effects on safety performance for median width and barriers, of access (driveways) and side streets and intersection turning lanes are presented. Each student receives a copy of the "Safety Effects of Highway Design Features" manual.

IMPORTANT: Participants should bring a scientific notation calculator as the course involves calculating decimal value to decimal power for crash prediction values.

OUTCOMES:

Upon completion of the course, participants will be able to:

• Recognize the safety effects of geometric design features
• Predict the safety performance of geometric design features
• Compare alternative designs based upon an assessment of the safety effects of geometric design features

TARGET AUDIENCE:

State and local highway engineers and consultants involved in the design of multilane highways.

If you have questions about this NHI training, please contact NHI at nhicustomerservice@dot.gov or 877.558.6873.