HSIS data are sometimes used in research studies that result in other types of finished products, such as dissertations, theses, and conference proceedings.
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.
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.
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.
|Passenger Vehicle-Motorcycle Pre-Crash Trajectory Reconstruction Results Based on an Extended Application of the NHTSA-Honda-DRI ACAT Safety Impact Methodology||January||R Michael Van Auken, John Lenkeit, and Terry Smith|
|Risk Factors Affecting Crash Injury Severity by Work Zone Area||January||Krupanidhi Koilada, Srinivas S Pulugurtha, and Ajinkya S Mane|
|Modeling of Guide Sign Illumination and Retroreflectivity to Improve Driver’s Visibility and Safety||January||Mohammed Obeidat|
|The Impacts of Illumination on Nighttime Safety at Roundabouts||January||Franklin E Gbologah|
|Nighttime Safety and Pavement Marking Retroreflectivity on Two-Lane Highways: Revisited with North Carolina Data||January||Paul J Carlson, Raul Avelar, Eun Sug Park, and Don Kang|
|Influence of Seasonal Temperature on Pavement Reliability Performance: A Case Study||May||Roya Amjadi, Jim Sherwood, and Gerardo Flintsch|
|Analysis of Factors Affecting Traffic Accident Severity Based on Heteroskedasticity Ordinal Logit||May||Zhangcun Yan, Xiaozhao Lu, and Wanxin Hu|
|A Framework for Developing Road Risk Indices Using Quantile Regression Based Crash Prediction Model||January||Hui Wu|
|Reliability-Based Safety Evaluation of Traffic on Rural Highway||January||Feng Chen|
|A Methodology to Explore the Relationship Between Pavement Marking Retroreflectivity and Traffic Crash||January||Donnell, E., V. Karwa, and S. Sathyanarayanan|
|Collision Prediction Models for Three-Dimensional Two-Lane Highways: I. Horizontal Curves||January||Easa, S. and Q. You|
|Collision Prediction Models for Three-Dimensional Two-Lane Highways: II. Horizontal Tangents||January||Easa, S. and Q. You|
|Application of Bayesian Statistics to Identify Highway Sections with Atypically High Rates of Median||January||Davis, G., H. Xiong, and H. Tao|
|The Benefits of Pavement Markings: A Renewed Perspective Based on Recent and Ongoing Research||January||Carlson, P.J., E.S. Park, and C.K. Anderson|
|No-Fault Insurance and Automobile Accidents||October||Heaton, P. and E. Helland|
|Evaluation of Alternative Hyper-priors for Bayesian Road Safety Analysis||January||Miranda-Moreno, L.F., D. Lord, and|
|Development of a Web-Based Expert System for Setting Speed Limits in Speed Zones||January||Srinivasan, R., D.L. Harkey, D. Tharpe, R. Sumner, and M.R. Parker|
|Optimization of Network Safety Improvements Using Empirical Bayes Analysis for Models with Accident||January||Banihashemi, M.|
|Exploratory Analysis of Relationship between the Number of Lanes and Safety on Urban Freeways||January||Kononov, J., B. Bailey, and B.K. Allery|
|Work Zone Safety and Mobility Issues: Case Study on Dan Ryan Reconstruction Project||January||Shi, J.|
|Use of Single Vehicle Collisions to Model Fatigue-Related Crashes on Rural Two-Lane Highways||January||Xu Lin|
|Safety Impacts of Interchange Spacing on Urban Freeways||January||Bared, J.G., P. Edara, and T. Kim|
|Safety Impacts of Differential and Uniform Car-Truck Speed Limits on Illinois and North Carolina Int||January|
|Identifying Secondary Crash Characteristics for California Highway System||January||Hirunyanitiwattana, W. and S. Mattingly|
|Numerical Examination of Freeway Rear-End Accidents Considering Mechanism of Accident Occurrence||January||Kim, J.K., G. Ulfarsson, and Y. Wang|
|Freeway Speeds and Speed Variations Preceding Crashes, Within and Across Lanes||January||Kockelman, K.M. and J. Ma|
|Anticipating Injury & Death: controlling for New Variables on Southern California Highways||January||Ma, J. and K.M. Kockelman|
|Evaluation of the Effectiveness of Shoulder Rumble Strips on Rural Multi-lane Divided Highways in Minnesota||January||Carrasco, O., J. McFadden, and P. Chandhok|
|Safety of U-Turns at Unsignalized Median Openings on Urban and Suburban Arterials||January||Potts, I.B., D.W. Harwood, H.S. Levinson, and J. Gluck|
|The Application of an Improved Highway Safety Evaluation||Jun Wang|
|Safety Evaluation of Continues Shoulder Rumble Strips Installed on Freeways||Michael S. Griffith|
|The Effects of Freeway Management Systems and Motorist Assistance Patrols on the Frequency of Report||Todd Olmstead|
|The Effect of Infrastructure and Demographic Change on Traffic-related Fatalities and Crashes: A Ca||Robert B. Noland, and Lyoong Oh|