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 8 of 8 for “"Signal Optimization"”.
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Isolated Traffic Signal Optimization Considering Delay, Energy, and Environmental Impacts
Traffic signal cycle lengths are traditionally optimized to minimize vehicle delay at intersections using the Webster formulation. This thesis includes two studies that develop new formulations to compute the optimum cycle length of isolated intersections, considering measures of effectiveness such …
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Decentralized graph-based multi-agent reinforcement learning for traffic signal optimization
Signalized intersections are persistent bottlenecks where inefficient operations contribute to congestion, delays, safety risks, and environmental impacts. Conventional control strategies provide stability under predictable demand but lack the adaptability required to manage stochastic and …
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A mixed-integer linear programming (MILP) model for dynamic coordinated signal optimization along a traffic corridor
… (MILP) framework for coordinated arterial signal optimization. Our contributions include a unified optimization model that jointly determines cycle length, phase sequencing, green-time allocation, and offset synchronization. We also introduce demand-responsive bounds adapting to real-time …
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Multi-objective Optimization in Traffic Signal Control
Traffic Signal Control systems are one of the most popular Intelligent Transport Systems and they are widely used around the world to regulate traffic flow. Recently, complex optimization techniques have been applied to traffic signal control systems to improve their performance. Traffic simulators …
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Autonomous Navigation of a Ground Vehicle to Optimize Communication Link Quality
… analysis of two main concepts that provided a signal optimization solution. The first attracts the communication ground vehicle to the network subsystems with weaker links using a vector summation of the signal-to-noise ratio and network subsystem position. This concept continuously generates a …
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Optimizing Traffic Network Signals Around Railroad Crossings
The dissertation proposed an approach, named "Signal Optimization Under Rail Crossing sAfety cOnstraints"(SOURCAO), to the traffic signal control near a highway rail grade crossing (HRGC). SOURCAO targets two objectives: HRGC safety improvement (a high priority national transportation goal) and …
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Weather Impacts on Traffic Parameters and Signal Timing Performance
… to assess benefit of weather responsive signal retiming. Traffic signal optimization and simulation software were used to assess the impact of rainfall and benefit of retiming on travel time and average delay on a section of a hypothetical roadway. Rainfall increased travel time and …
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Computationally efficient simulation-based optimization algorithms for large-scale urban transportation problems
… we propose novel computationally efficient optimization algorithms that derive effective traffic management strategies to reduce congestion and improve the efficiency of urban transportation systems. The proposed algorithms enable the use of high-resolution yet computationally inefficient …