Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 207 for “"on-road"”.
-
Repeatability of on-road routes and a comparison of on-road routes to the federal test procedure
… Virginia University has developed a Mobile Emissions Measurement System that recorded vehicle, engine, and exhaust behavior during in-use testing. This system obtained data from numerous vehicles over specified on-road routes. A study was conducted on on-road route repeatability. A methodology for …
-
Comparison of heavy-duty diesel engine emissions between an on-road route and engine dynamometer simulated on-road cycle
Heavy-duty diesel engines are known to emit concentrations of harmful compounds of oxides of nitrogen (NOx) and particulate matter (PM). As a means of emissions control, engine dynamometer certification is currently employed. Current certification cycles provide for standardized comparisons, but …
-
Effects of stabilizer bars on road vehicle ride quality
In an effort to improve the safety and road-holding capabilities of vehicles, manufacturers have begun a trend toward increasing vehicle body roll resistance by introducing stiffer roll-stabilizer bars. In this study vehicle suspension and road surface models are developed to investigate the …
-
On-Road Investigation of Fluorescent Sign Colors to Improve Conspicuity
… program undertaken by the Virginia Transportation Research Council and the Virginia Tech Transportation Institute in cooperation with the 3M Company and the Virginia Department of Transportation for the evaluation of visual performance of retroreflective signs of various color combinations. …
-
The impact of localized road accident information on road safety awareness
The World Health Organization (WHO) estimate that road traffic accidents represent the third leading cause of ‘death and disease’ worldwide. Many countries have, therefore, launched safety campaigns that are intended to reduce road traffic accidents by increasing public awareness. In almost every …
-
Explaining the Performance of Bidirectional Dijkstra and A* on Road Networks
<p>The heuristic search community traditionally uses A* as the baseline algorithm for their research methods. Research papers in the road networks community, however, often build upon Dijkstra's algorithm and use Bidirectional Dijkstra's algorithm as their baseline. This thesis investigates the …
-
Institutional perspectives on road pricing : essays on implementation, response, and adaptation
Road pricing involves charging road users a fee for the external social costs of using private vehicles. These costs typically remain unaccounted for in routine road transport operations and benefit-cost analyses. They include the costs of travel delays for other road users due to congestion, the …
-
Multidimensional Warnings: Evaluating Curve Warning Stimuli in an On-Road Environment
Horizontal curves on roadways are the site of numerous crashes and motorist deaths each year. Traditional methods to warn drivers of curve hazards, including static roadside signs, are sometimes ineffective at influencing driver behavior for reasons such as driver acclimation to inconsistency in …
-
Development of a Microscopic Emission Modeling Framework for On-Road Vehicles
The transportation sector has a significant impact on the environment both nationally and globally since it is a major vehicle fuel consumption and emissions contributor. These emissions are considered a major environmental threat. Consequently, decision makers desperately need tools that can …
-
Awareness of deficits and on-road driving performance among persons with acquired brain injury
<p>This study examined the relationship of neuropsychological and on-road driving evaluations among adults with acquired brain injury (ABI), and the extent to which that relationship is moderated by awareness of deficit. Awareness of deficit may partly explain mixed findings regarding the …
-
THE EFFECT OF SYNOPTIC SCALE WEATHER AND TOPOGRAPHY ON ROAD SURFACE TEMPERATURES IN DEVON
Microclimates of various road weather stations in Devon were examined. Road surface temperatures were measured during various synoptic conditions. Data from the thermal mapping exercise conducted by Vaisala TMI were analysed and categorised as clear and calm, cloudy and windy, and a condition …
-
Quantifying the Impact of Pavement Surface Properties on Road Safety: A Data-Driven Approach
… Safety Manual's (HSM) safety performance functions (SPFs) are widely used for network screening and project prioritization; however, most formulations focus on volumetric exposure and geometry and omit pavement surface characteristics that govern tire–road interaction. Despite the growing …
-
An On-Road Assessment of Driver Secondary Task Engagement and Performance during Assisted & Automated Driving
… driving (PAD) and a limited number of SAE conditionally automated vehicles (CAD) are being developed. Vehicles with PAD systems support the driver through longitudinal and lateral control inputs. However, during PAD the driver must be prepared to take control of the vehicle at any time, …
-
Health Risks from On-Road Truck Emissions in Little Village, Chicago Pre- and Post-COVID Pandemic
… including increased mortality, and truck emissions are a major contributor to urban PM2.5 pollution. As freight activity intensifies in densely populated cities, understanding the impact of truck-related emissions on air quality and public health becomes critical, particularly in environmental …
-
AEVITA : designing biomimetic vehicle-to-pedestrian communication protocols for autonomously operating & parking on-road electric vehicles
With research institutions from various private, government and academic sectors performing research into autonomous vehicle deployment strategies, the way we think about vehicles must adapt. But what happens when the driver, the main conduit of information transaction between the vehicle and its …
-
Driver Behavior Analysis Based on Real On-Road Driving Data in the Design of Advanced Driving Assistance Systems
The number of vehicles on the roads increases every day. According to the National Highway Traffic Safety Administration (NHTSA), the overwhelming majority of serious crashes (over 94 percent) are caused by human error. The broad aim of this research is to develop a driver behavior model using real …
-
Characterization and source apportionment of ambient PM2.5 in Atlanta, Georgia: on-road emission, biomass burning and SOA impact
Characterization and Source Apportionment of Ambient PM2.5 in Atlanta, Georgia: On-Road Emission, Biomass Burning and SOA Impact Bo Yan 260 Pages Directed by Drs. Armistead G. Russell and Mei Zheng Various airborne PM2.5 samples were collected in the metropolitan Atlanta and surrounding areas, …
-
VEHICLES¿ NON-EXHAUST EMISSIONS: SETUP OF EXPERIMENTAL APPROACHES FOR ON-ROAD CHARACTERIZATION OF TIRE WEAR AND ROAD DUST PARTICLES
The transition toward cleaner mobility has led to notable reductions in vehicles’ tailpipe emissions; however, non-exhaust emissions (NEEs), particularly those from tire and road wear particles (TRWPs), have emerged as a dominant and under-investigated source of airborne particulate matter. TRWPs …
-
Using Eye Tracking Technology To Compare Hazard Detection On Road Versus Driving Simulator At Night Across Two Age Groups
Rationale: Though previous literature exists that demonstrates the validity of using driving simulation compared to on-road driving, few studies have examined hazard detection between two driving conditions. Even fewer studies have specifically examined hazard detection at night. Results of current …
Page 1 of 11