Now showing items 1-10 of 38
Pavement Marking Visibility Requirements During Wet Night Conditions
(Virginia Center for Transportation Innovation and Research, 2006-11)
This study investigated the performance of pavement markings in wet night conditions. Typically, performance will decrease in wet conditions. The degradation is a result of flooding of the marking optics and a change in ...
Development and validation of a luminance camera: final report
(Virginia Tech. Virginia Tech Transportation Institute, 2009-02-11)
Under the sponsorship of the National Surface Transportation Safety Center for Excellence (NSTSCE), an effort was undertaken to develop a system of image capture to analyze luminance data gathered in naturalistic driving research.
Luminance metrics for roadway lighting
(Virginia Tech. Virginia Tech Transportation Institute, 2011-03-25)
The focus of the current study is the comparison of multiple contrast metrics... The images of pedestrians from a previous nighttime research study were used for analysis. The pedestrians were clothed in both denim and ...
Applicability of mesopic factors to the driving task
With the advent of light-emitting diode technology being applied to roadway lighting, the spectral power distribution of the light source is becoming much more important. In this experiment, the detection of pedestrians ...
Light Levels for Parking Facilities Based on Empirical Evaluation of Visual Performance and User Perceptions
(Taylor & Francis, 2020-04-02)
Light levels recommended for parking facilities should be backed by empirical research that accounts for all users. In the current study, pedestrians’ and drivers’ visual performance and their perceptions of safety, comfort, ...
Enhanced Night Visibility Series, Volume I: Executive Summary
(United States. Federal Highway Administration, 2005-12)
This volume, an executive summary of the Enhanced Night Visibility project, is the first of 18 volumes that report on the project's evaluation of the merit of implementing supplemental ultraviolet headlamps, supplemental ...
Work Zone Lighting’s Effect on Driver Visibility
(National Surface Transportation Safety Center for Excellence, 2019-06-05)
Portable light towers are a significant source of glare to motorists entering a work zone. Although existing research has evaluated the effect of light tower orientation on visibility and glare, the effects of factors like ...
Assessment of the Durability of Wet Night Visible Pavement Markings: Wet Visibility Project Phase IV
(Virginia Center for Transportation Innovation and Research, 2012-06)
This project encompassed a research effort to establish the durability of pavement markings in an on-road installation. Six marking technologies were installed on a portion of Route 460 in Blacksburg, Virginia. A human ...
(National Surface Transportation Safety Center for Excellence (NSTSCE), 2017-02-28)
Under the sponsorship of the National Surface Transportation Safety Center for Excellence (NSTSCE), a research team at the Virginia Tech Transportation Institute (VTTI) developed a color camera system that can collect ...
Development of a Mobile Measurement System for Roadway Lighting
(National Surface Transportation Safety Center for Excellence, 2018-01-04)
In recent years, the complexity of the evaluation metrics of roadway lighting has continually increased. In order to measure the effectiveness of a roadway lighting system in situ, a mobile measurement system has been ...