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The National Academies

NCHRP 17-89A [Final]

HOV/HOT Freeway Crash Prediction Method for the Highway Safety Manual

  Project Data
Research Agency: Vanasse Hangen Brustlin, Inc.
Principal Investigator: Scott Himes
Effective Date: 7/10/2018
Completion Date: 12/31/2021

BACKGROUND
 
The first edition of the AASHTO Highway Safety Manual (HSM) in 2010 provided the transportation industry with a method to estimate crash type and frequency by severity for standard highway facility types. However, the HSM does not address freeway facilities with high-occupancy vehicle (HOV) lanes, high-occupancy toll (HOT) lanes, or other managed-lane strategies.
 
There are many design elements of freeways with HOV/HOT lanes that influence performance. Research was needed to develop a safety predictive methodology that can be used to estimate the expected crash frequency and severity of a range of freeway facilities with HOV or HOT with various geometric and traffic volume characteristics. 
 
OBJECTIVES
 
The objectives of this research were to (a) develop a predictive methodology that can be used to estimate crash frequency and severity for freeway facilities, and associated ramps, with HOV or HOT lanes and (b) provide a tool for highway agencies to quantify safety performance in planning, project development, and operation of freeways with HOV or HOT lanes.
 
STATUS
 
 
 

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