Safety and economic impacts of converting two-way frontage roads to one-way : methodology and findings Page: I

                                
Technical Report Documentation Page
1. Report No.                   2. Government Accession No.     3. Recipient's Catalog No.
FHWA/TX-11/0-5856-1
4. Title and Subtitle                                           5. Report Date
SAFETY AND ECONOMIC IMPACTS OF CONVERTING TWO-                   September 2010
WAY FRONTAGE ROADS TO ONE-WAY: METHODOLOGY                       Published: January 2011
AND FINDINGS                                                     6. Performing Organization Code
7. Author(s)                                                    8. Performing Organization Report No.
William L. Eisele, Christine E. Yager, Marcus A. Brewer, William E.  Report 0-5856-1
Frawley, Eun Sug Park, Dominique Lord, James A. Robertson, and
Pei-fen Kuo
9. Performing Organization Name and Address                     10. Work Unit No. (TRAIS)
Texas Transportation Institute
The Texas A&M University System                                  11. Contract or Grant No.
College Station, Texas 77843-3135                               Project 0-5856
12. Sponsoring Agency Name and Address                          13. Type of Report and Period Covered
Texas Department of Transportation                              Technical Report:
Research and Technology Implementation Office                    September 2007-August 2010
P.O. Box 5080                                                    14. Sponsoring Agency Code
Austin, Texas 78763-5080
15. Supplementary Notes
Project performed in cooperation with the Texas Department of Transportation and the Federal Highway
Administration.
Project Title: Safety and Economic Impacts of Converting Two-Way Frontage Roads to One-Way
URL: http://tti.tamu.edu/documents/0-5856-1.pdf
16. Abstract
In the research documented here, researchers develop information to communicate the safety and
economic impacts of converting frontage roads from two-way to one-way. Researchers studied five
locations in Texas where frontage roads were converted from two-way operation to one-way operation.
Researchers identified a comparison site in Texas that remained two-way for comparison to four of the
treatment (conversion) sites.
Researchers developed accident modification factors (AMFs) related to frontage road conversion
segments that roadway designers can use to guide frontage road conversion project planning. Researchers
developed AMFs based on non-property-damage-only (non-PDO) crashes for segments and interchange
intersections. Researchers developed 12 AMFs and provide confidence intervals around the estimates.
Researchers describe how the AMFs were developed, associated caveats, and how to apply the AMFs.
Researchers also document the process used to build the safety database from electronic data-sets and printed
crash reports. Finally, researchers provide recommendations to facilitate and expedite future crash analyses.
Researchers attempted to investigate the economic impacts of frontage road conversion by analyzing
gross sales data, appraisal data, employment data, and surveys of business owners/managers and customers.
Only the appraisal data and survey information were at the parcel level along the corridors and survey
sample size was limited.
17. Key Words                                   18. Distribution Statement
Frontage Road, Frontage Road Conversion, Crash  No restrictions. This document is available to the
Reduction Factor, CRF, Accident Modification    public through NTIS:
Factor, AMF, Safety, Economic Impact            National Technical Information Service
Springfield, Virginia 22161
http://www.ntis.gov

19. Security Classif.(of this report)         20. Security Classif.(of this page)           21. No. of Pages       22. Price
Unclassified                                  Unclassified                                  320
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