Browsing Virginia Tech Transportation Institute (VTTI) by Title
Now showing items 1-20 of 635
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100-car reanalysis: summary of primary and secondary driver characteristics
(National Surface Transportation Safety Center for Excellence, 2010-08-27)This project's goal was to build a complete trip file inventory for the 100-Car data set... Data points collected for each file include Driver ID (with new IDs created as new secondary drivers were found), Ambient Lighting, ... -
30 Years – 20 State DOTs: Trends in Pavement Management observed through real world Implementation at the State DOT Level
(2013-06-04)Since the first International Conference on Managing Pavement Assets 30 years ago in 1985, there has been continuous enhancement and evolution of pavement management system (PMS) technology to produce more effective ... -
3D Mapping of Pavements: Geometry and DTM
(2014-09) -
3D Pavement Surface Macrotexture: Measurements And Friction Relationships
(2012)Pavement macrotexture is typically reported as mean profile depth over a standard base length. Recently, a new measurement method based on photometric stereo system was introduced. The method requires a minimum of three ... -
4U Lighting – Cooperative Headlighting
(National Surface Transportation Safety Center for Excellence, 2019-10-31)The purpose of this project was to evaluate the effectiveness of an alternative cooperative headlighting method, dubbed 4U Lighting. A human-subjects study was conducted in which 12 participants 65 or older observed ... -
9th International Conference on Managing Pavement Assets
(2015-05)This conference program lists the events that took place during the 9th International Conference on Managing Pavement Assets (ICMPA9), which was held from May 18-21, 2015 in Alexandria, VA. The conference brought together ... -
About The Reproducibility Of Texture Profiles And The Problem Of Spikes
(2012)The ISO working group ISO/TC43/SC1/WG39 has recently been worrying about the quality of texture profiles, measured with laser profilometers. It appears that the quality has not improved in recent years, rather on the ... -
About The Rolling Resistance Trailer And Parameters Influencing Rolling Resistance
(2012)The issue of global warming by an excessive amount of carbon dioxide (CO2) in the atmosphere is a hot topic and the consequences for man and environment become more and more clear. Road transportation plays a significant ... -
Accelerated Testing and Instrumentation: A Canadian Case Study
(2015-06-04)The primary objective of this paper is to describe how the CPATT Test Track is used to advance Canadian pavement engineering practices through the investigation of the impact of axle loads and environment on flexible and ... -
Access Control Design on Highway Interchanges
(Virginia Center for Transportation Innovation and Research, 2008-01-01)The adequate spacing and design of access to crossroads in the vicinity of freeway ramps are critical to the safety and traffic operations of both the freeway and the crossroad. The research presented in this report develops ... -
Active and Adaptive Roadway Delineation Systems
(National Surface Transportation Safety Center for Excellence, 2017-10-13)Heavy fog presents a significant safety hazard to drivers by reducing their ability to see the roadway and other vehicles. Even so, drivers often fail to adjust their speed to account for the reduced visibility, resulting ... -
Adaptive Control of the Atmospheric Plasma Spray Process for Functionally Graded Thermal Barrier Coatings
(Hindawi, 2022-11-23)Functionally graded coatings (FGCs) have a material composition continuously varying through the thickness but uniform in the surface parallel to the coated substrate. When used as a thermal barrier on a metallic substrate, ... -
Adaptive Traffic Signal Control: Game-Theoretic Decentralized vs. Centralized Perimeter Control
(MDPI, 2021-01-03)This paper compares the operation of a decentralized Nash bargaining traffic signal controller (DNB) to the operation of state-of-the-art adaptive and gating traffic signal control. Perimeter control (gating), based on the ... -
Addressing Uncertainties of Performance Modelling with Stochastic Information Packages – Incorporating Uncertainty in Performance and Budget Forecasts
(2015-05-19)A large volume of data is collected world-wide to feed pavement management systems (PMS). The data is typically condensed to characterize pavement sections or smaller sub-networks by using statistical measures mostly ... -
Advancing Pavement Surface Evaluation to Support Engineering and Investment Decisions
(2015-05-01)The American Association of State Highway and Transportation Officials (AASHTO's) Pavement Rutting and Cracking Quantification Expert Task Group (ETG) was formed in 2006 with Federal Highway Administration (FHWA) funding ...
