David L. Harkey, P.E.


David Harkey was appointed Director of HSRC in the summer of 2006. Prior to this position he served as the Associate Director for Operations at HSRC. He is also a senior research engineer, whose focus is on applying transportation engineering principles and research evaluation methodologies to improve highway safety for motorists, pedestrians, and bicyclists in the areas of traffic operations, geometric design, and roadside design. Harkey works closely with the behavioral researchers at HSRC on many studies to develop and evaluate countermeasures that combine engineering and behavioral components to address safety problems.

Harkey has conducted numerous studies for the Federal Highway Administration (FHWA), National Cooperative Highway Research Program (NCHRP), National Highway Traffic Safety Administration (NHTSA), and other government and private agencies. Current projects on which he is the Principal Investigator or Co-Principal Investigator include:

Crash Reduction Factors for Traffic Engineering and ITS Improvements (NCHRP 17-25)
The goal of this project is to produce crash reduction factors (CRFs) for high-priority treatments or combination of treatments where none currently exist, and to increase the level of predictive certainty for existing CRFs in other high-priority efforts.
Guidelines for Accessible Pedestrian Signals (NCHRP 3-62)
The goal of this effort is to improve upon the guidance currently available to practitioners with respect to installing, operating, and maintaining accessible pedestrian signals. The end products of this research will include updated material for the Manual on Uniform Traffic Control Devices and training resources. An interim product of this research is available at www.walkinginfo.org/aps.
Highway Safety Information System - HSIS (FHWA)
The HSIS is a multistate database that contains crash, roadway inventory, and traffic volume data for a select group of States. Current projects being managed by Mr. Harkey as part of this effort include:
  • Pedestrian and Bicycle Crash Analysis Tool (PBCAT) upgrade – designed to assist practitioners with the development and analysis of a data base containing detailed crash data on pedestrian – and/or bicycle-motore vehicle collisions. More information is available at www.walkinginfo.org/pbcat .
  • Evaluation of in-vehicle technologies for acquire roadway curve and grade data.
Expert System for Recommending Speed Limits in Speed Zones (NCHRP 3-67)
The objective of this project is to develop a knowledge-based expert system for recommending speed limits in speed zones that are considered to be credible and enforceable in the eyes of traffic engineers, politicians and policy makers, enforcement officials, judges and magistrates, and drivers.
PEDSAFE – Pedestrian Safety Guide and Countermeasure Selection System
The end-product of this effort will be a web application, as well as a CD and print document, that will allow practitioners to select appropriate countermeasures for improving pedestrian safety and mobility. The application includes an expert system for selecting treatments, detailed descriptions of countermeasures, case studies of real-world applications of these treatments, and resource material for improving walkability in a community.