Download or read book Validation of the Two fluid Model of Urban Traffic for Arterial Streets written by Wahid M. Farhat and published by . This book was released on 2003 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Transportation Research Record written by and published by . This book was released on 2004 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Validation of Two fluid Model on Arterial Streets written by Xu Yuanhang and published by . This book was released on 2003 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Validation of Arterial Travel time Estimation Models Using Field Data and Simulation written by Michael P. Dixon and published by . This book was released on 2007 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study of Two Fluid Model with Ring Road Simulation written by Shangyou Zeng and published by . This book was released on 2015 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Two-fluid model has been used as a macroscopic method to evaluate urban network performance for decades. Different achievements have been made regarding to the use of the two-fluid model in city network and arterial street level. Data collected during peak hours is always used for parameter estimation, but how different congestion levels would affect the two-fluid model parameters has never been discussed. In this thesis, it is verified with ring road simulation data that under over-saturated or under-saturated traffic conditions, the two parameters, Tm and n, cannot be properly estimated. Beijing data is used in the second part to verify that GPS data from cellphone can be used for verification of the two-fluid model. Two data collection methods are used here: one is time-based, and the other distance-based. It is proved that with traffic data collected during peak hours, distance-based data is more accurate to estimate the two-fluid model parameters.

Download or read book Explainable Artificial Intelligence for Smart Cities written by Mohamed Lahby and published by CRC Press. This book was released on 2021-11-09 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thanks to rapid technological developments in terms of Computational Intelligence, smart tools have been playing active roles in daily life. It is clear that the 21st century has brought about many advantages in using high-level computation and communication solutions to deal with real-world problems; however, more technologies bring more changes to society. In this sense, the concept of smart cities has been a widely discussed topic in terms of society and Artificial Intelligence-oriented research efforts. The rise of smart cities is a transformation of both community and technology use habits, and there are many different research orientations to shape a better future. The objective of this book is to focus on Explainable Artificial Intelligence (XAI) in smart city development. As recently designed, advanced smart systems require intense use of complex computational solutions (i.e., Deep Learning, Big Data, IoT architectures), the mechanisms of these systems become ‘black-box’ to users. As this means that there is no clear clue about what is going on within these systems, anxieties regarding ensuring trustworthy tools also rise. In recent years, attempts have been made to solve this issue with the additional use of XAI methods to improve transparency levels. This book provides a timely, global reference source about cutting-edge research efforts to ensure the XAI factor in smart city-oriented developments. The book includes both positive and negative outcomes, as well as future insights and the societal and technical aspects of XAI-based smart city research efforts. This book contains nineteen contributions beginning with a presentation of the background of XAI techniques and sustainable smart-city applications. It then continues with chapters discussing XAI for Smart Healthcare, Smart Education, Smart Transportation, Smart Environment, Smart Urbanization and Governance, and Cyber Security for Smart Cities.

Download or read book The two fluid characterization of urban traffic written by Siamak Assaee Ardekani and published by . This book was released on 1984 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scaling the Two fluid Model of Town Traffic to Characterize Traffic at Signalized Intersections written by Cheryl A. Jankowski and published by . This book was released on 2001 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Lane changing Model for Urban Arterial Streets written by Daniel(Jian) Sun and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The lane-changing probability for each DLC scenario was modeled as a function of corresponding important factors (obtained from focus group) and driver types. In gap acceptance modeling, the "hand-shaking negotiation" concept (from the TCP/IP protocols in computer network communications) was introduced to describe the vehicle interactions during lane-changing maneuvers under congested traffic flow. The proposed lane-changing model was developed and implemented in a microscopic traffic simulator, CORSIM. Traffic data were collected along a congested arterial in the City of Gainesville, FL, and used for model calibration and validation purposes. Simulation capabilities of the newly developed model were compared against the original lane-changing model in CORSIM. The results indicate that the new model better replicates the observed traffic under different levels of congestion.

Download or read book Acceleration static and delay written by William Paul Sheldon and published by . This book was released on 1972 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book HRIS Abstracts written by and published by . This book was released on 1986 with total page 1222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling Travel Time and Average Speed to Evaluate Urban Arterial Performance written by Harini Mangilipally and published by . This book was released on 2012 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic system performance can be measured in various ways, but from the user perspective, congestion is the major criterion. To assess the congestion levels for arterials with numerous signalized intersections and access points, travel time and speed are considered as the key performance measures. Collecting these data for all links in the transportation network is expensive, laborious and time-consuming. Literature, however, documents limited efforts to model and assess performance based on these measures for urban arterials.The objective of this research is to develop and validate models to estimate these key measures for assessment of urban arterial street performance. Road network characteristics, traffic characteristics, traffic control devices and signal parameters were considered as explanatory variables to evaluate delay in link travel time and average network speed. Five models: 1) average speed including length, 2) average speed excluding length, 3) delay in travel time using the basic equation, 4) delay in travel time using Bureau of Public Roads (BPR) equation with standard a and P parameters, and 5) delay in travel time using BPR equation with a and P parameters obtained from a regional travel demand forecasting model were developed. Models were developed including and excluding intercept to show the effect of intercept or constant in the model. Results indicate that average speed models are comparatively better statistical models than travel time models to assess urban arterials performance. The average speed models including length are comparatively better statistical models than the models excluding length.To closely understand the effect of signal spacing on link travel time and average travel speed, statistical analysis on the influence of signal spacing on link travel time and average travel speed was also done and the results show that the increase in the number of signals per mile has a negative effect on arterial performance.

Download or read book The Calibration Validation and Comparison of VISSIM Simulations Using the Two fluid Model written by Jeremy McCandless Crowe and published by . This book was released on 2009 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microscopic traffic simulation program VISSIM is a powerful tool that has been used by transportation engineers and urban planners around the world. A VISSIM simulation is meant to depict the performance of the physical road network through the use of modeling tools and behavioral parameters. The process which gets the model to the point of matching real world conditions is called calibration and requires a means of relating the real world to the simulated world. The topic of this thesis discusses a new means of calibration using the two-fluid model. The two-fluid model is a macroscopic modeling technique which provides quantitative characteristics of the performance of traffic flow on an urban road network. The model does this by generating a relationship between the travel time, stopped time, and running time per mile. The two-fluid model has been used to evaluate the performance of road networks for decades but now it is possible to use it to calibrate a VISSIM model. For this thesis, the two-fluid model to be used for calibration was generated from data collected on the Orlando, Florida, downtown network in February, 2008, during three traffic peaks for three typical weekdays. The network was then modeled in VISSIM which required a large amount of data regarding network geometry, signal timings, signal coordination schemes, and turning movement volumes. A similar data collection exercise was conducted during November, 2008, to capture the effects of changes that took place in the network during the ten month period. Another VISSIM network was also made to match the conditions of the November network. The February field data was used to successfully calibrate the VISSIM model and the November data was used to validate the calibrated network. The validation proved that the two-fluid models from the November field data and VISSIM data are statistically similar. With the network calibrated and validated, it could be used to perform scenario tests to see how the network performance would be affected by changes to the network. The two-fluid model has often been used to compare two different physical networks or explore how the performance of a single physical network has changed over time. A similar comparison can be done with the two-fluid models from a calibrated, simulated network. By using the original calibrated models as base cases, scenarios ranging from lane closures due to traffic incidents to the addition of a whole new signalized corridor on the network can be modeled in VISSIM and compared with the corresponding base case. This would allow a governing agency to preview the effects of proposed changes.

Download or read book Transportation Science written by and published by . This book was released on 1984 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Models Overview Handbook written by James R. Mekemson and published by . This book was released on 1993 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Highway Capacity and Flow Theory and Characteristics written by National Research Council (U.S.). Transportation Research Board and published by Transportation Research Board National Research. This book was released on 1987 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2726 pages. Available in PDF, EPUB and Kindle. Book excerpt: