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.
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Showing 1 to 20 of 44 for “"rear-end"”.
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Driving Simulator Validation And Rear-end Crash Risk Analysis At A Signalised Intersection
… and SR-50 eastbound through lanes have a higher rear-end crash risk than that at SR-50 westbound right turn lane and SR-434 northbound through lanes, respectively. This conforms to the risk of rear-end crashes observed at the actual intersection. Therefore, the simulator is validated for using it …
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Finite Element Analysis of the Effect of Low-Speed Rear End Collisions on the Medial Meniscus
<p>Low-speed, rear end vehicle collisions can inflict soft tissue damage to the passenger’s knees, especially the medial meniscus, which has been previously unexplained in published literature. It is difficult to determine if factors such as age or other injury was the primary cause of the injury …
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Analytic Assessment of Collision Avoidance Systems and Driver Dynamic Performance in Rear-End Crashes and Near-Crashes
… and fielded to reduce the number and severity of rear-end crashes. Kinematic algorithms within CASs evaluate sensor input and apply assumptions describing human-response timing and deceleration to determine when an alert should be presented. This dissertation presents an analytic assessment of …
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The Use Of The Ucf Driving Simiulator To Test The Contribution Of Larger Size Vehicles (lsvs) In Rear-end Collisions And Red Light Running On Intersections.
… The U.S. Department of Transportation spends millions of dollars every year on research that aims to improve roadway safety and decrease the number of traffic collisions. In spring 2002, the Center for Advanced Traffic System Simulation (CATSS), at the University of Central Florida, …
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Modeling Crash Frequencies At Signalized Intersections In Central Flor
… In this research, crashes and their type, e.g., rear-end, left-turn and angle as well as total crashes were investigated. Numerous models were developed first using the Poisson regression and then using the Negative Binomial approach as the data showed overdispersion. The modeling process aimed …
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Estimation Of Hybrid Models For Real-time Crash Risk Assessment On Freeways
… has been used to identify all crashes (such as rear-end, sideswipe, or angle), even though traffic conditions preceding crashes are known to differ by type of crash. Moreover, a generic model would yield no information about the collision most likely to occur. To be able to analyze different …
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Prospects for the Collision-Free Car: The Effectiveness of Five Competing Forward Collision Avoidance Systems
Rear-end collisions in which the leading vehicle was stationary prior to impact and at least one vehicle was towed from the crash site represent 18% of all yearly crashes in the United States. Forward Collision Avoidance Systems (FCASs) are becoming increasingly available in production vehicles and …
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Determination of a Whiplash Injury Severity Estimator (WISE Index) for Occupants in a Motor Vehicle Accident
… for whiplash injury in a directfront-or-rear-end automobile collision. The Whiplash Injury Severity Estimator (WISE Index) was created using data obtained from Dr. Schneck's personal library of case files, including the collisionacceleration of the vehicle, and the height, weight, and sex …
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Neural Network Trees And Simulation Databases: New Approaches For Signalized Intersection Crash Classification And Prediction
… occurring at signalized intersections into rear-end, angle, turn and sideswipe crash types based on the traffic and geometric properties of the intersections and the conditions at the time of the crashes. This was achieved by using an innovative approach developed in this thesis "Neural …
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Examining Route Diversion And Multiple Ramp Metering Strategies For Reducing Real-time Crash Risk On Urban Freeways
… and Abdel-Aty, 2006). These models yield the rear-end and lane-change crash risk along the freeway in real-time by using static information at various locations along the freeway as well as real-time traffic data that is obtained from the roadway. Because these models use the real-time traffic …
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Analysis of crash and survey data to identify young drivers' distractions in Kansas
… in one of the three most common crash types: rear-end, angular, and single-vehicle crashes. Furthermore, ordered logistic modeling was used to analyze the crash data to identify the odds of more severe injuries for teenage and young-adult distracted drivers and their passengers involved in …
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Methodology for Determining Crash and Injury Reduction from Emerging Crash Prevention Systems in the U.S.
… Finally, we simulated 2,459 real-world rear-end collisions as if the driver had an FCAS with combinations of warnings, brake assist, and autonomous braking. We found that between 3.4% and 7.2% of crashes could be prevented and that many more could be mitigated in severity. These systems …
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Experimental and numerical investigation of the flow structures at the rear of three-dimensional bluff bodies
… This thesis studies the flow structures at the rear end of 3D bluff bodies to aid the development of flow control strategies. In the first method, a modified SAB with a 25° slant angle is proposed that uses elliptical curvature at the rear end and is denoted as the elliptical Ahmed body (EAB). …
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Safety Analyses At Signalized Intersections Considering Spatial, Temporal And Site Correlation
… spatial, and site correlations for total, rear-end, right-angle and left-turn crashes. Using the basic regression model for correlated crash data leads to invalid statistical inference, due to incorrect test statistics and standard errors based on the misspecified variance. In this …
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Analysis Of Various Car-truck Crash Types Based On Ges And Fars Crash Databases Using Mutlinomial And Binary Logit Model
… need to be analyzed further to study the trends for a car-truck crash and develop some countermeasures to lower these crashes. Various types of car-truck crashes are analyzed in this study and the effects of various roadway/environment factors and variables related to driver characteristics …
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Safety Effects Of Traffic Signal Installations On State Road Intersections In Northeast Florida
… rate by 16%, although neither was significant. Rear-end crashes increased by 86% and the rear-end crash rate decreased by 5%. Neither of these changes was statistically significant. When crash severity was examined, it was found that the number of injury crashes increased by 64.8% and the rate …
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Reliable Bandwidth Conservative Queue-End Detection and Warning System Using Smart Phone Collaboration Techniques
… road congestion is, the more vulnerable the tail end of the congestion is to rear end collisions. In order to avoid rear end collisions, it is important to know the end location of the traffic jam (i.e. the end of the queue) hence the name, queue-end (q-end) problem. If the exact q-end location is …
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Traffic Conflict Analysis Under Fog Conditions Using Computer Simulation
… of traffic conflicts: lane-change conflicts and rear-end conflicts. The experimental model generated several groups of traffic trajectory data files. The vehicle conflicts data were stored in these trajectory data files which, contains the conflict locations' coordinates, conflict time, …
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SPACE-CONSTRAINED AUTONOMOUS REVERSING OF ARTICULATED VEHICLES
… on minimising the tracking error between the rear-end of the combination and a desired path, irrespective of the motion of the rest of the vehicle. A significant disadvantage of these strategies is that the other parts of the vehicle, particularly the tractor unit, can experience large …
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New Dilemma Zone Mitigation Strategies
… when passing through the intersection or a rear-end collision when failing to stop safely.Improperly timed traffic signal intervals result in the inability of the drivers to make the right decision and can place them in the dilemma zone. Advance warning systems (AWS) have been used to …
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