This monograph provides a comprehensive overview of methods for searching, evaluating, and optimizing highway location and alignments using genetic algorithms (GAs), a powerful Artificial Intelligence (AI) technique. It presents a two-level programming structure to deal with the effects of varying highway location on traffic level changes in surrounding road networks within the highway location search and alignment optimization process. In addition, the proposed method evaluates environmental impacts as well as all relevant highway costs associated with its construction, operation, and maintenance. The monograph first covers various search methods, relevant cost functions, constraints, computational efficiency, and solution quality issues arising from optimizing the highway alignment optimization (HAO) problem. It then focuses on applications of a special-purpose GA in the HAO problem where numerous highway alignments are generated and evaluated, and finally the best ones are selected based on costs, traffic impacts, safety, energy, and environmental considerations. A review of other promising optimization methods for the HAO problem is also provided in this monograph.

Benefit-Cost Analysis (BCA) aids in making capital investment decisions by determining whether the benefits of a proposed action justify its costs. This synthesis, Effective Practices for Preparing Airport Improvement Program Benefit-Cost Analysis, defines and describes benefit assessment techniques used by airports as well as other modes, highlights best practices, and identifies inconsistencies of how benefits are calculated and where there is confusion in the benefit-cost guidance published by the FAA. The project focused on a review of benefit-cost literature, including benefit-cost analyses submitted to the FAA, and structured interviews with airport managers and other applicants, consultants who prepared BCA studies, and FAA staff. BCA is a tool to aid agencies in project selection and prioritization. At its core, it is a computational tool to determine whether an investment will generate benefits that will exceed its costs. This analysis is accomplished by expressing all current and future benefits and costs on an equivalent basis, which is their present value (PV). A project is economically efficient if it has a positive Net Present Value (calculated as the PV of benefits minus the PV of costs), and hence also a Benefit-Cost Ratio exceeding one.

A multi-disciplinary approach to transportation planningfundamentals The Transportation Planning Handbook is a comprehensive,practice-oriented reference that presents the fundamental conceptsof transportation planning alongside proven techniques. This newfourth edition is more strongly focused on serving the needs of allusers, the role of safety in the planning process, andtransportation planning in the context of societal concerns,including the development of more sustainable transportationsolutions. The content structure has been redesigned with a newformat that promotes a more functionally driven multimodal approachto planning, design, and implementation, including guidance towardthe latest tools and technology. The material has been updated toreflect the latest changes to major transportation resources suchas the HCM, MUTCD, HSM, and more, including the most current ADAaccessibility regulations. Transportation planning has historically followed the rationalplanning model of defining objectives, identifying problems,generating and evaluating alternatives, and developing plans.Planners are increasingly expected to adopt a moremulti-disciplinary approach, especially in light of the risingimportance of sustainability and environmental concerns. This bookpresents the fundamentals of transportation planning in amultidisciplinary context, giving readers a practical reference forday-to-day answers. Serve the needs of all users Incorporate safety into the planning process Examine the latest transportation planning softwarepackages Get up to date on the latest standards, recommendations, andcodes Developed by The Institute of Transportation Engineers, thisbook is the culmination of over seventy years of transportationplanning solutions, fully updated to reflect the needs of achanging society. For a comprehensive guide with practical answers,The Transportation Planning Handbook is an essentialreference.

This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, explores the underlying relationships among households, firms, and travel demand. The report also describes a regional scenario planning tool that can be used to evaluate the impacts of various smart growth policies.