Turner-Fairbank Highway Research Center


Journal Citations

Many of the studies conducted using HSIS data result in publication in professional journals, conference proceedings, research records, and other peer-reviewed documents.

Title Pub Date Author
Safety Evaluation of Permanent Raised Snow-Plowable Pavement Markers Jan-04 Persaud, B, G. Bahar, C. Mollett, and C. Lyon
Effects of Work Zone Presence on Injury and Non-Injury Crashes Jan-02 Asad J. Khattak, Aemal J. Khattak, and Forrest M. Council
Three-Strand Cable Median Barrier in North Carolina: In-Service Evaluation Jan-01 W.W. Hunter, J.R. Stewart, K.A. Krull, H.F.Huang, F.M. Council, and D.L.Harkey
Explaining two-lane highway crash rates using land use and hourly exposure Jan-00 John N. Ivan, Chunyan Wang, and Nelson R. Bernardo
Safety Effects of the Conversion of Rural Two-Lane to Four-Lane Roadways Based on Cross-Sectional Mo Oct-99 Forrest M. Council and J. Richard Stewart
Effects of Speed Limit Increases on Crash Injury Severity: Analysis of Single-Vehicle Crashes on Nor Oct-99 Henry Renski, Asad J. Khattak, and Forrest M. Council
Safety Evaluation of Rolled-In Continuous Shoulder Rumble Strips Installed on Freeways Oct-99 Michael S. Griffith
Estimating Truck-Rollover Crashes on Ramps by Using a Multistate Database Jan-99 Wang, J. and F.M. Council
Evaluation of Truck Crashes Using a GIS-Based Crash Referencing and Analysis System David L. Harkey
Investigation of National Highway System Roadways in the Highway Safety Information System States Sep-98 Charles V. Zegeer, Herman F. Huang, J. Richard Stewart, and Carolyn Williams
Effects of a Towaway Reporting Threshold on Crash Analysis Results Sep-98 Charles V. Zegeer, Herman F. Huang, J. Richard Stewart, Ron Pfefer and Jun Wang
Accident Models for Two-Lane Rural Segments and Intersections Sep-98 Andrew Vogt and Joe Bared
Applying the ordered Probit Model to Injury Severity in Truck-Passenger Car Rear-End Collisions Sep-98 Chandler S. Duncan, Asad J. Khattak, and Forrest M. Council
Role of Adverse Weather in Key Crash Types on Limited-Access: Roadways Implications for Advanced Wea Jan-98 Khattak, A.J., P. Kantor, and F.M. Council
Safety Effects of Cross-section Design on Rural Multi-lane Highways Jan-98 Jun Wang, Warren E. Hughes, and J. Richard Stewart
Effects of Air Bags on Severity Indices for Roadside Objects Jan-97 Forrest M. Council, Yusuf M. Mohamedshah, and J. Richard Stewart
Vehicle-Animal Crashes: An Increasing Safety Problem Aug-96 Warren E. Hughes, A. Reza Saremi, and Jeffrey F. Paniati
Investigation of Highway Work Zone Crashes: What We Know and What We Don't Know Jan-96 Jun Wang, Warren E. Hughes, Forrest M. Council, and Jeffrey F. Paniati
Comparison of the Safety of Lighting Options on Urban Freeways Michael S. Griffith
Accident Rates Using HSIS Yusuf M. Mohamedshah, and Amy R. Kobls

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Safety Effects of Horizontal Curve and Grade Combinations on Rural Two-Lane Highways

The safety effects of horizontal curves and grades on rural two-lane highways have been quantified in the American Association of State Highway and Transportation Officials (AASHTO) Highway Safety Manual (HSM), but it was not previously known whether and how the safety performance of horizontal curves and grades interact. Furthermore, there are no established safety effects for crest and sag vertical curves, and it is unknown whether and how the safety performance of crest or sag vertical curves is affected by the presence of horizontal curves.

The objective of this study was to quantify the combined safety effects of horizontal curves and grade combinations and express the results as crash modification factors (CMFs) that can be considered for use in the AASHTO HSM.

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Safety Evaluation of Converting Traffic Signals from Incandescent to Light-Emitting Diodes

Across the Nation, many agencies have been replacing conventional incandescent light bulbs in traffic signals with light-emitting diodes (LED). LEDs are primarily installed to reduce energy consumption and decrease maintenance. In addition, LEDs are expected to last much longer compared with incandescent bulbs and tend to age gradually. However, a recent study revealed several potential problems with LEDs, including their inability to melt snow and issues related to visual discomfort caused by glare at night.

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Safety Evaluation Of Discontinuing Late-Night Flash Operations at Signalized Intersections

During late-night flash (LNF) mode (from late night to early morning hours), traffic signals flash yellow for one road (typically, the major road), requiring caution but no stopping, and flash red for the other road (typically, the minor road), requiring drivers to stop and then proceed through the intersection after yielding to the traffic on the major road. The intent of LNF is to reduce energy consumption and delay during periods of low traffic demand. However, in recent years, many agencies have begun replacing LNF with normal phasing operation because of safety concerns.

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