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 68 for “"freeways"”.
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A System for Travel Time Estimation on Urban Freeways
… (ATIS) applications. People traveling on urban freeways are interested in knowing how long it will take them to reach their destinations, particularly under congested conditions. Though many advances have been made in the field of traffic engineering and ITS applications, there is a lack of …
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Evaluation of two-lane ramp merges on urban freeways
Thesis (M.S.)--Michigan State University. Dept. of Civil Engineering, 1971
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Design of a cooperative overtaking algorithm for platoons on freeways
… cooperative overtaking algorithm for platoons on freeways. The algorithm can decide, depending on the traffic situation, whether it is possible, useful, and safe to overtake. If that is the case, it executes the overtaking maneuver cooperatively without splitting up the platoon. The algorithm …
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DATA-DRIVEN METHODS FOR REDUCING WRONG-WAY CRASHES ON FREEWAYS
Driving the wrong way on freeways has been a nagging traffic safety problem since the interstate highway system was founded in the 1950s. Despite four decades of highway striping and sign improvements at freeway interchanges, the problem persists. This paper is to determine the contributing factors …
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Developing crash modification factors for operational parameters on urban freeways
… crash modification factors (CMFs) for urban freeways by considering level of service (LOS) deterioration due to change in hourly traffic volumes. Here, this study investigates LOS when it deteriorated from A to B, B to C, C to D, D to E and E to F using hourly volume and hourly crash data …
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Implementation Strategies For Real-time Traffic Safety Improvements On Urban Freeways
This research evaluates Intelligent Transportation System (ITS) implementation strategies to improve the safety of a freeway once a potential of a crash is detected. Among these strategies are Variable Speed Limit (VSL) and ramp metering. VSL are ITS devices that are commonly used to calm traffic …
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Estimation Of Hybrid Models For Real-time Crash Risk Assessment On Freeways
Relevance of reactive traffic management strategies such as freeway incident detection has been diminishing with advancements in mobile phone usage and video surveillance technology. On the other hand, capacity to collect, store, and analyze traffic data from underground loop detectors has …
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Shifting urban priorities : the removal of inner city freeways in the United States
The United States Interstate Highway System transformed the nation's cities and countryside, accelerating suburbanization and leading to unprecedented levels of motorized mobility. While the interstate highways brought undeniable benefits, they also imparted social, environmental and aesthetic …
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Examination Of Factors Affecting The Frequency, Response Time, And Clearance Time Of Incidents On Freeways
… that detect and respond to incidents and restore freeways to full capacity by clearing the incident scene as soon as possible. In the Detroit metro area, the Michigan Department of Transportation (MDOT) operates a Freeway Courtesy Patrol (FCP) program as part of its larger freeway incident …
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Microscopic Simulation Model for Mixed Traffic of Connected Automated Vehicles and Conventional Vehicles on Freeways
This study developed mixed-traffic simulation models of connected automated vehicles (CAVs) and manually-driven vehicles (MDVs) at the full-spectrum of mixed penetration rates on a freeway segment by incorporating the car-following and lane-changing models via a conditional linkage to investigate …
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Examining Route Diversion And Multiple Ramp Metering Strategies For Reducing Real-time Crash Risk On Urban Freeways
Recent research at the University of Central Florida addressing crashes on Interstate-4 in Orlando, Florida has led to the creation of new statistical models capable of calculating the crash risk on the freeway (Abdel-Aty et al., 2004; 2005, Pande and Abdel-Aty, 2006). These models yield the …
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Evaluating Ramp Metering And Variable Speed Limits To Reduce Crash Potential On Congested Freeways Using Micro-simulation
… for identifying crash prone conditions on freeways has led to the introduction of several statistical models which can flag such conditions with a good degree of accuracy. Outputs from these models have the potential to be used as real-time safety measures on freeways. They may also act as …
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Existence and Uniqueness of the Solution of a Traffic Flow Partial Differential Equation on Multi-Lane Freeways
<p>In this dissertation, we shall prove the existence of a solution of the stochastic partial differential equation describing the density of cars on a multi-lane freeway using the operator splitting method. Furthermore, we shall prove the uniqueness of the solution of the stochastic differential …
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Assessing Crash Occurrence On Urban Freeways Using Static And Dynamic Factors By Applying A System Of Interrelated Equations
Traffic crashes have been identified as one of the main causes of death in the US, making road safety a high priority issue that needs urgent attention. Recognizing the fact that more and effective research has to be done in this area, this thesis aims mainly at developing different statistical …
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Modeling lane-selection and lane-change frequency on congested urban freeways: empirical evidence from Chicago’s I-90/I-94 freeway
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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The Impacts of Road Capacity Removal
… with a critical decision: do we repair or remove freeways from our urban centers? Freeway repair is exceptionally expensive, but removing a freeway is widely seen as a risky venture which may result in negative traffic effects. Therefore, it is necessary to gain a clearer understanding of how …
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The relationship between land-use and urban freeway interchanges
… exists and, in particular, becomes apparent when freeways and interchanges are introduced into urban areas. There is at present controversy as to whether freeways should be built in urban areas. It is alleged that freeways disrupt urban land-uses, are costly and are, in the long term, ineffective …
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Rethinking the Role of Urban Freeway: A Remediation of the I-5 Freeway in Downtown Seattle
… on people’s health has been increased by having freeways in cities. Secondly, urban freeways impede social and economic equity since they are most likely to be placed in low-income communities and minority neighborhoods in American cities. Lastly, urban freeways create voids generating …
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Regulating Traffic Flow and Speed on Large Networks: Control and Geographical Self Organizing Map (Geo-SOM) Clustering
… used. The LA network is known for its congested freeways, so a development of a Freeway-SMC-SH controller is performed and tested. It shows good results in improving the performance not only of freeways, but also the overall LA network performance. Particularly, the network-wide average travel …
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