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 19 of 19 for “"Time to Collision"”.
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Time-to-collision algorithm and real-time implementation
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Time to collision algorithm : properties and real time implementation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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An On-Road Investigation of Commercial Motor Vehicle Operators and Self-Rating of Alertness and Temporal Separation as Indicators of Driver Fatigue
… field investigation employed, for the first time, a completely automated, trigger-based data collection system capable of evaluating driver performance in an extended duration real-world commercial motor vehicle environment. The complexities associated with the development of the system, both …
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Bio-inspired vision-based evasion control: collision avoidance without distance measurement
In the past decade, the appearance of multiple autonomous vehicle platforms - such as self-driving cars (SDC), unmanned aerial vehicles (UAVs), delivery robots and precision agriculture drones - have emerged with an accelerated pace. Their development has been driven by enormous research at the …
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Evaluation of an acoustic detection algorithm for reactive collision avoidance in underwater applications
This thesis sought to evaluate a vehicle detection algorithm based on a passive acoustic sensor, intended for autonomous collision avoidance in Unmanned Underwater Vehicles. By placing a hydrophone at a safe distance from a dock, it was possible to record the acoustic signature generated by a small …
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A simulator study to evaluate Emergency Alert Lighting system for truck mounted attenuators
A driving simulator study was conducted to compare the effectiveness of different Emergency Alert Lighting (EAL) system configurations used on MoDOT work vehicles. Two warning light colors (amber and white) in conjunction with modified horn timing (delay vs. no delay) were compared during daytime …
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Driver Behavior in Car Following - The Implications for Forward Collision Avoidance
Forward Collision Avoidance Systems (FCAS) are a type of active safety system which have great potential for rear-end collision avoidance. These systems use either radar, lidar, or cameras to track objects in front of the vehicle. In the event of an imminent collision, the system will warn the …
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Driver Safety and Emissions at Different PPLT Indications
According to NCHRP Report 493, there are five major left turn signal indications for permitted operations in the United States. They are: Circular Green (CG), Flashing Circular Red (FCR), Flashing Red Arrow (FRA), Flashing Circular Yellow (FCY) and Flashing Yellow Arrow (FYA). The main goal of this …
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Safety analysis of freeway interchange speed change lane facilities
… a diverging area for exiting vehicles. Due to the merging and diverging maneuvers, the entrance and exit speed change lane segments experience more conflicts than a basic freeway segment. One study found that 36 percent of all crashes at a freeway interchange occur as drivers enter the …
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Measurement of Driver Preferences and Intervention Responses as Influenced by Adaptive Cruise Control Deceleration Characteristics
In comparison to conventional cruise control, adaptive cruise control (ACC) vehicles are capable of sensing forward traffic and slowing to accommodate as necessary. When no forward vehicles are present, ACC function is the same as conventional cruise control. However, with ACC, when a slower …
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Study of Delay Calculation for Diverging Diamond Interchange and Safety Assessment of Ecodriving on Following Traffic
… diamond interchanges (DDI) have been proved to outperform other types of diamond interchanges in terms of safety, cost-effectiveness and efficiency, but few research efforts have been done to conduct the analytic calculation of delay, with which optimization of timing plans can be acquired …
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Intelligent Road Control System Using Advanced Image Processing Techniques
Over the past few years, Support Vector Machine (SVM) has been widely used in data classification field and has already been proved as an optimal solution for both linear and nonlinear classification problems. Since the image segmentation can be considered as a type of classification, SVM can be …
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The Effects of Vehicle Automation Level and Warning Type on Responses to Vehicle Hacking
… vehicles often include different levels of automation. Higher automation levels have the potential to impact surface transportation in unforeseen ways. For example, connected vehicles with higher levels of automation are at a higher risk for hacking attempts, because automated driving …
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Connected Vehicle Technology: User and System Performance Characteristics
… Yet, many questions remain unanswered as to how various user and system characteristics of CV-enabled networks can shape the successful implementation of the technology to maximize the return on investment. This research attempts to capture the effect of multiple factors such as traffic …
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Takeover Required! Augmented Reality Head-Up Displays' Ability to Increase Driver Situation Awareness During Takeover Scenarios in Driving Automation Systems
The number of automated features in surface vehicles are increasing as new vehicles are released each year. Some of these features allow drivers to temporarily take their attention off-road and en-gage in other tasks. However, there are times when it is important for drivers to immediately take …
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Modeling Slow Lead Vehicle Lane Changing
Driving field experiment data were used to investigate lane changes in which a slow lead vehicle was present to: 1) characterize lane changes, 2) develop predictive models, 3) provide collision avoidance system (CAS) design guidelines. A total of 3,227 slow lead vehicle lane changes over 23,949 …
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Modeling Driver Behavior at Signalized Intersections: Decision Dynamics, Human Learning, and Safety Measures of Real-time Control Systems
Traffic conflicts associated to signalized intersections are one of the major contributing factors to crash occurrences. Driver behavior plays an important role in the safety concerns related to signalized intersections. In this research effort, dynamics of driver behavior in relation to the …
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Non-Line of Sight Test Scenario Generation for Connected Autonomous Vehicle
Connected autonomous vehicles (CAV) level 4-5 use sensors to perceive their environment. These sensors are able to detect only up to a certain range and this range can be further constrained by the presence of obstacles in its path or as a result of the geometry of the road, for example, at a …
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Effectiveness of Intersection Advanced Driver Assistance Systems in Preventing Crashes and Injuries in Left Turn Across Path / Opposite Direction Crashes in the United States
… year. Active safety systems have the potential to reduce crashes and injuries across all crash modes by partially or fully controlling the vehicle in the event that a crash is imminent. The objective of this thesis was to evaluate crash and injury reduction in a future United States fleet …