Network Screening on Low-Volume Roads Using Risk Factors

Author:

Huda Kazi Tahsin1,Al-Kaisy Ahmed2ORCID

Affiliation:

1. Department of Engineering Technology and Construction Management, University of North Carolina, Charlotte, NC 28213, USA

2. Department of Civil Engineering, Montana State University, Bozeman, MT 59717, USA

Abstract

This paper proposes a new method for network screening on rural low-volume roads. These roads are important as they provide critical access to agricultural land and tourist attractions. Most low-volume roads belong to the lowest functional class (local rural roads) and thus are built to lower design standards. Conventional hot spot network screening techniques may not be appropriate for low-volume roads due to the sporadic nature of crashes occurring on these roads. Conversely, sophisticated network screening approaches require extensive roadway and traffic data that are often unavailable to local agencies due to a lack of resources, and/or a lack of technical expertise. This research attempts to address these obstacles to low-volume road network screening which aims to identify candidate sites for safety improvements. The research used an extensive low-volume road sample from the state of Oregon and Empirical Bayes expected number of crashes in developing the proposed models for network screening. The proposed models do not require exact measurements of roadway geometric features as all geometric variables were classified into categories that are easy to compile by local agencies. Further, the method could be used with and without traffic data, without compromising the effectiveness of the network screening process.

Funder

Western Transportation Institute’s Small Urban, Rural

Tribal Center on Mobility

Publisher

MDPI AG

Reference21 articles.

1. National Highway Traffic Safety Administration (NHTSA) (2018). Rural Urban Comparison of Traffic Fatalities.

2. Federal Highway Administration. (FHWA) (2019, March 28). Manual on Uniform Traffic Control Devices, Available online: http://mutcd.fhwa.dot.gov/.

3. Low-Volume Roads and Road Safety Audits—Lessons Learned;Gross;Transp. Res. Rec. J. Transp. Res. Board,2011

4. Federal Highway Administration. (FHWA) (2019, March 25). Systemic Safety Project Selection Tool, Available online: http://safety.fhwa.dot.gov/systemic/.

5. Minnesota Department of Transportation (MnDOT) (2018, March 25). Minnesota’s Systemic Approach Integrates Safety Performance into Investment Decisions for Local Roads, Available online: https://www.fhwa.dot.gov/innovation/everydaycounts/edc_4/pdf/case_study_mn_oct2014.pdf.

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