Technical Reports (VTTI)
Browse by
Recent Submissions
-
AI Dash Cam Performance Benchmark Testing
(2023-06-30)The objective of this project was to benchmark the performance of three driver monitoring systems (DMSs): Motive DC-54, Samsara HW-CM32, and Lytx DriveCam SF400. The study was conducted in two phases. Phase One was an ... -
Implementation and Evaluation of a Buried Cable Animal Detection System and Deer Warning Sign
(Virginia Transportation Research Council, 2019-05)Animal-vehicle collisions (AVC), and deer-vehicle collisions (DVC) in particular, are a major safety problem on Virginia roads. Mitigation measures such as improved fencing and location-specific driver alerts are being ... -
Implementation of a Precast Inverted T-Beam System in Virginia: Part II: Analytic and Field Investigations
(Virginia Transportation Research Council, 2018-08)The inverted T-beam superstructure is a bridge system that provides an accelerated construction alternative for short-to-medium-span bridges. The system consists of adjacent precast inverted T-beams with a cast-in-place ... -
Full-Scale Laboratory Evaluation of Hybrid Composite Beams for Implementation in a Virginia Bridge
(Virginia Transportation Research Council, 2018-08)This research project studied a steel-reinforced concrete and fiber-reinforced polymer (FRP) structural element called the Hybrid-Composite Beam (HCB). The beam was used in a skewed simple span superstructure replacement ... -
Carbon Fiber Reinforced Polymer Grids for Shear and End Zone Reinforcement in Bridge Beams
(Virginia Transportation Research Council, 2018-01)Corrosion of reinforcing steel reduces life spans of bridges throughout the United States; therefore, using non-corroding carbon fiber reinforced polymer (CFRP) reinforcement is seen as a way to increase service life. The ... -
Evaluation of Innovative Approaches to Curve Delineation for Two-Lane Rural Roads
(Virginia Transportation Research Council, 2018-06)Run-off-road crashes are a major problem for rural roads. These roads tend to be unlit, and drivers may have difficulty seeing or correctly predicting the curvature of horizontal curves. This leads to vehicles entering ... -
Examination of the Current Practice of Lighting in Virginia: Nighttime Work Zones and Improving Safety Through the Development of Nighttime Lighting Specifications
(Virginia Transportation Research Council, 2017-09)This project evaluated current nighttime work zone lighting practices for limited-access highways and primary routes in Virginia through (1) an on-site evaluation of lighting levels in work zones; (2) an illuminance ... -
Analysis of Repeated Network-Level Testing by the Falling Weight Deflectometer on I-81 in the Virginia Department of Transportation's Bristol District
(Virginia Transportation Research Council, 2016-11)This study was undertaken in an effort to determine the required time between subsequent rounds of network-level pavement deflection testing using a falling weight deflectometer (FWD) on the Virginia Department of ... -
Linear Cracking in Bridge Decks
(Virginia Transportation Research Council, 2018-03)Concrete cracking in bridge decks remains an important issue relative to deck durability. Cracks can allow increased penetration of chlorides, which can result in premature corrosion of the reinforcing steel and subsequent ... -
Continuous Friction Measurement Equipment As a Tool for Improving Crash Rate Prediction: A Pilot Study
(Virginia Transportation Research Council, 2016-01)A comprehensive pavement management system includes a Pavement Friction Management Program (PFMP) to ensure pavement surfaces are designed, constructed, and maintained to minimize friction-related crashes in a costeffective ... -
Assessment of the Performance of Light-Emitting Diode Roadway Lighting Technology
(Virginia Transportation Research Council, 2015-10)This study, championed by the Virginia Department of Transportation (VDOT) Traffic Engineering Division, involved a thorough investigation of light-emitting diode (LED) roadway lighting technology by testing six types of ... -
Evaluation of the MMLS3 for Accelerated Wearing of Asphalt Pavement Mixtures Containing Carbonate Aggregates
(Virginia Transportation Research Council, 2014-06)The purpose of this study was to develop an accelerated wearing protocol for assessing the susceptibility of asphalt surface mixtures to polishing. This was the second phase of the study. The first phase focused on assessing ... -
Best Practices and Performance Assessment for Preventative Maintenance Treatments for Virginia Pavements
(Virginia Transportation Research Council, 2015-08)Preventive maintenance has the potential to improve network condition by retarding future pavement deterioration. This report outlines guidelines for implementing a preventive maintenance policy for bituminous pavements. ... -
Evaluation of a Buried Cable Roadside Animal Detection System
(Virginia Transportation Research Council, 2015-06)Animal-vehicle collisions (AVC) are a concern for departments of transportation as they translate into hundreds of human fatalities and billions of dollars in property damage each year. A recently published report states ... -
Safety, Operational, and Energy Impacts of In-vehicle Adaptive Stop Displays Using Connected Vehicle Technology
(Connected Vehicle/Infrastructure University Transportation Center (CVI-UTC); Research and Innovative Technology Administration, 2015-07-30)Un-signalized intersections create multiple opportunities for missed or misunderstood information. Stop sign-controlled intersections have also been shown to be a source of delay and emissions due to their frequent, often ... -
Description of the SHRP 2 Naturalistic Database and the Crash, Near-Crash, and Baseline Data Sets
(Virginia Tech Transportation Institute, 2016-04)The focus of this project was to identify and prepare crash, near-crash, and baseline data sets extracted from the Second Strategic Highway Research Program (SHRP 2) Naturalistic Driving Study (NDS) trip files, then to ... -
Identification of Consented Driver Trips in the SHRP 2 Naturalistic Driving Study Data Set
(Virginia Tech Transportation Institute, 2015-02)The Second Strategic Highway Research Program (SHRP 2) Naturalistic Driving Study (NDS) data set contains approximately 5.51 million naturalistic driving trip files across thousands of consented drivers, making it the ... -
Infrastructure Pavement Assessment & Management Applications Enabled by the Connected Vehicles Environment – Proof-of-Concept
(Research and Innovative Technology Administration; Connected Vehicle/Infrastructure University Transportation Center (CVI-UTC), 2015-09-30)The objective of this project was to develop prototypes and conduct a field test of system level applications of a connected vehicle pavement condition measurement system. This allowed the research team to: (1) investigate ... -
Automated Vehicle Crash Rate Comparison Using Naturalistic Data
(Virginia Tech Transportation Institute, 2016-01-08)This study assessed driving risk for the United States nationally and for the Google Self-Driving Car project. Driving safety on public roads was examined in three ways. The total crash rates for the Self-Driving Car and ... -
Potential Reduction in Large Truck and Bus Traffic Fatalities and Injuries Using Lytx's DriveCam Program
(Lytx; Virginia Tech, 2014-05)This study quantitatively evaluated the potential safety benefits of equipping all United States heavy trucks and buses in the U.S. with Lytx™ Inc.’s DriveCam® program. Heavy trucks and buses include the following vehicle ...
RSS 1.0