The Development of Local Calibration Factors for Implementing the Highway Safety Manual in Maryland

The primary goal is to explore the recommended calibration procedures and determine local calibration factors to predict accidents for Maryland-specific application.

The specific objectives are as follows:

  1. review the Highway Safety Manual (HSM) published in 2010
  2. review available studies that apply and evaluate the suggested methodologies in HSM
  3. collect all required data for the state of Maryland and create a comprehensive dataset (e.g., Annual Average Daily Traffic (AADT), traffic crashes, roadway geometry, etc.)
  4. using HSM methodology, estimate crash frequencies, severity, and types of crashes for roadway segments and intersections by type and functional classification
  5. compare crash frequencies predicted by HSM methodology and observation, and estimate calibration factors, if the predicted numbers and actual numbers are not identical
  6. create a spreadsheet database of local calibration factors for each type of segment and intersection

Start date: February 1, 2012
End date: February 1, 2013
Contract/Grant Number: SP209B4J
Total Dollars: 100,000

Index Terms: Highway safety manual, Maryland, traffic accidents, accident data, data collection, data files, calibration

Sponsoring Organization:
Maryland State Highway Administration
707 N. Calvert Street
Baltimore, MD 21202

Performing Organization:
Morgan State University
National Center for Transportation Management, Research and Development
1700 E. Cold Spring Lane
Center for Built Environment and Infrastructure Studies 327
Baltimore, MD 21251

Principal Investigators:
Hyeon-Shic Shin
Phone: 443-885-3348

Young-Jae Lee, Ph.D.
Phone: 443-885-1872

Project Manager:
Hua Xiang
Phone: 410-545-2953

Subjects: Highways, data and information technology, safety and human factors