Many of the studies conducted using HSIS data result in publication in professional journals, conference proceedings, research records, and other peer-reviewed documents.
|Appraisal of the Interactive Highway Safety Design Model's Crash Prediction and Design Modules: Case||Feb-09||Donnell, E.T., F. Gross, B.P. Stodart, and K.S. Opiela|
|Safety Effectiveness of Lane and Shoulder Width Combinations on Rural, Two-Lane, Undivided Roads||Jan-09||Gross, F., P.P. Jovanis, and K.A. Eccles|
|Analysis of Effects of Pavement Marking Retroreflectivity on Traffic Crash Frequency on Highways in||Jan-09||Donnell, E.T., V. Karwa, and S. Sathyanarayanan|
|Safety Impact of Truck Lane Restrictions on Multilane Freeways||Jan-09||Fontaine, M.D., C.S. Bhamidipati, and L.E. Dougald|
|Analysis of Road Crash Frequency with Spatial Models||Jan-09||guero-Valverde, J. and P.P. Jovanis|
|Two Low-Cost Safety Concepts for Two-Way, Stop-Controlled Intersections in Rural Areas||Jan-09||Gross, F., R. Jagannathan, and W. Hughes|
|Adjustment for Maximum Likelihood Estimate of Negative Binomial Dispersion Parameter||Jan-08||Park, B. and D. Lord|
|Effects of Varying Dispersion Parameter of Poisson-Gamma Models on Estimation of Confidence Interval||Jan-08||Geedipally, S.R. and D. Lord|
|Safety Evaluation of Installing Center Two-Way Left-Turn Lanes on Two-Lane Roads||Jan-08||Lyon, C., B.N. Persaud, N.X. Lefler, D.L. Carter, and K.A. Eccles|
|Safety Evaluation of Flashing Beacons at Stop-Controlled Intersections||Jan-08||Srinivasan, R., D.L. Carter, B.N. Persaud, K.A. Eccles, and C. Lyon|
|Safety Effectiveness of "Stop Ahead" Pavement Markings||Jan-08||Gross, F., R. Jagannathan, C. Lyon, and K. Eccles|
|Relationships Between Safety and Both Congestion and Number of Lanes on Urban Freeways||Jan-08||Kononov, J., B. Bailey, and B.K. Allery|
|Predicting motor vehicle collisions using Bayesian neural network models: An empirical analysis||Sep-07||Xie, Y., D. Lord, and Y. Zhang|
|Difficulties with Quasi-Induced Exposrue when Speed Varies Systematically by Vehicle Type||Jul-07||Jiang, X. and R.W. Lyles|
|Estimating Safety Benefits of Shoulder Rumble Strips on Two-Lane Rural Highways in Minnesota: Empiri||Jan-07||Patel, R., F. Council, and M. Griffith|
|Crash Prediction Models for Intersections on Rural Multilane Highways: Differences by Collision Type||Jan-07||Jonsson, T., J.N. Ivan, and C. Zhang|
|Multivariate Poisson-Lognormal Models for Jointly Modeling Crash Frequency by Severity||Jan-07||Park, E.S. and D. Lord|
|Modeling the Probability of Freeway Rear-End Crash Occurrence||Jan-07||Kim, J.K., Y. Wang, and G.F. Ulfarsson|
|Application of Innovative Time Series Methodology to Relationship Between Retroreflectivity of Pavem||Jan-07||Masliah, M., G. Bahar, and E. Hauer|
|Turning Young Drivers into Survivors||Sep-06||Opiela, K.S., B.M. Sant,and J.A. Childers|
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.