Compliance to standardized highway design criteria is considered essential to ensure roadway safety. However, for a variety of reasons, situations arise where exceptions to standard-design criteria are requested and accepted after review. This research explores the impact that such design exceptions have on the frequency and severity of highway accidents in Indiana. Data on accidents at careful...

This paper presents an intelligent traffic monitoring system using wireless vision sensor network that captures and processes the real-time video image to obtain the traffic flow rate and vehicle speeds along different urban roadways. This system will display the traffic states on the front roadways that can guide the drivers to select the right way and avoid potential traffic congestions. On t...

This paper presents a vehicle occlusion identification system based on the perceptive characters of a roadway. To tracking the vehicles, two stages are devised, initial parameter setting stage and occlusion handling stage. In the initial stage, a background extracting method is adopted to obtain the first clean background. Then, a road detection algorithm is used for finding the vanishing point...

certain conditions limit the independence of deprived people. however, those conditions do not limit the right of these people to receive dental care. portable dental units may make it possible for the deprived and elderly to receive the care they deserve in more areas. this study aimed to explore dentists' perceptions of the use of portable dental units in community outreach programs as a prec...

background and objective: obstructive sleep apnea (osa) is a disease with serious consequences. many portable devices have been developed to overwhelm some of limitations in the accessibility of the gold standard test for osa, polysomnography (psg). this study aimed to determine diagnostic accuracy of a portable sleep apnea screener against psg in patients of a sleep clinic. materials and metho...

This report presents enhancements to STRUCTVIEW, a vehicle-based system for the measurement of roadway structure profiles. This second-generation system uses a scanning laser rangefinder to measure various structure and roadway features from a vehicle traveling at highway speed. Measurement capabilities include horizontal and vertical clearances, which can be used to support issuing permits bas...

To optimize dedusting efficiency in coal mines, a model of dust movement in heading roadway with farpressing-near-absorption ventilation system was built. The empirical drag force model was applied into the unsteady inter phase coupling modeling of air and dust flow. The Discrete Phase Modeling in Fluent was employed to solve the problem and unstructured grids were utilized to mesh the complex ...

This research presents a comprehensive analysis of motor vehicle-bicycle crashes using 4 years of reported crash data (2004-2007) in Beijing. The interrelationship of irregular maneuvers, crash patterns and bicyclist injury severity are investigated by controlling for a variety of risk factors related to bicyclist demographics, roadway geometric design, road environment, etc. Results show that ...

In this study, two-state Markov switching count data models are proposed as an alternative to zero-inflated models, in order to account for preponderance of zeros typically observed in accident frequency data. Similar to zero-inflated models, two-state Markov switching models assume an existence of two states of roadway safety. One of the states is a zero-accident state, which is safe. The othe...

Executive Summary: In this project our group set out to determine what effect, if any, an air monitor's distance from the roadway had on the measured air pollution levels of carbon monoxide, nitrogen dioxide, and fine particulate matter (PM2.5). The group was also searching to see if we could identify pollution emitters using wind data. "Fine particles," such as those found in smoke and haze, a...