The most common method for producing regional or metropolitan area travel forecasts in the United States is to apply the following four modeling steps sequentially: trip generation; trip distribution; mode choice; and, route assignment. This traditional 4-step process passes output from one step to the next as input. While the process has produced forecast results sufficiently accurate for many types of long range transportation planning, it is commonly found that some of the outputs of the process are not consistent with inputs to earlier steps. The research undertaken in this project focused on methods to ensure that link speeds used in each step of the travel forecasting process are consistent with the final speeds estimated in the final step of the process. As a product of this research, a final report was prepared to provide guidance in the application of feedback.

The tools of operations research (OR)--optimization, simulation, game theory, and others--are increasingly applied to the entire range of problems encountered by civil and environmental engineers. In this groundbreaking text/reference, the world's leading experts describe sophisticated OR opplications across the spectrum of environmental and civil engineering specialties, addressing problems encountered in both operation and design.

A comprehensive update, the fourth edition of this leading text features numerous chapters by new authors addressing the latest trends and topics in the field. The book presents the foundational concepts and methodological tools that readers need in order to engage with today's pressing urban transportation policy issues. Coverage encompasses passenger and freight dynamics in the American metropolis; the local and regional transportation planning process; and questions related to public transit, land use, social equity and environmental justice, energy consumption, air pollution, transportation finance, sustainability, and more. Among the student-friendly features are special-topic boxes delving into key issues and 87 instructive figures, including eight color plates. New to This Edition *Extensively revised coverage of information and communication technologies, urban freight, travel behaviors, and regional transportation planning. *Engaging discussions of current topics: smartphone travel tracking, Uber, car and bike sharing, food deserts, biofuels, and more. *Heightened focus on climate change. *Reflects over a decade of policy changes, technological advances, and emergent ideas and findings in the field. *Most of the figures and special-topic boxes are new.

Describes available tools--studies, conferences, courses, reports, data, and quantitative models--that can help planners and policymakers respond to the requirements of the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA) and the Clean Air Act Amendments of 1990 (CAAA). This report is presented in three major sections: Categorized Listings - technical assistance products sorted by principal subject category; Resource Centers - a list of DOT-sponsored sources of information and assistance on intermodal transportation; and Indices - by title, by lead agency, and by product.

A history of urban travel demand modeling (UTDM) and its enormous influence on American life from the 1920s to the present. For better and worse, the automobile has been an integral part of the American way of life for decades. Its ascendance would have been far less spectacular, however, had engineers and planners not devised urban travel demand modeling (UTDM). This book tells the story of this irreplaceable engineering tool that has helped cities accommodate continuous rise in traffic from the 1950s on. Beginning with UTDM’s origins as a method to help plan new infrastructure, Konstantinos Chatzis follows its trajectory through new generations of models that helped make optimal use of existing capacity and examines related policy instruments, including the recent use of intelligent transportation systems. Chatzis investigates these models as evolving entities involving humans and nonhumans that were shaped through a specific production process. In surveying the various generations of UTDM, he delves into various means of production (from tabulating machines to software packages) and travel survey methods (from personal interviews to GPS tracking devices and smartphones) used to obtain critical information. He also looks at the individuals who have collectively built a distinct UTDM social world by displaying specialized knowledge, developing specific skills, and performing various tasks and functions, and by communicating, interacting, and even competing with one another. Original and refreshingly accessible, Forecasting Travel in Urban America offers the first detailed history behind the thinkers and processes that impact the lives of millions of city dwellers every day.