Intelligent road design
WIT Press, Feb 28, 2006 - Technology & Engineering - 422 pages
In the last two decades most urban roads have experienced tremendous growth in traffic leading to frequent congestion and delays. Due to shrinking right-of-way and limited highway budgets, roadway planners and designers have been constantly exploring innovative ways of road design. Moreover, in recent years, highway agencies have often found it difficult to secure adequate funds for road construction due to conflicting public opinions and political views. This book addresses the intelligent concepts of the ancient endeavor of road design. An intelligent road design model that can quickly optimize horizontal and vertical alignments will allow quick evaluations of many competing alignment alternatives that should allow quicker political and public approval. For such purposes this book extensively discusses how a road alignment optimization model can be developed and applied in real case studies.Based on over eight years of research by the authors in intelligent road design and alignment optimization, this advanced text book will be appropriate for road planners, designers, senior undergraduate students and graduate students.
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Traditional methods for alignment optimization
Basic definitions and properties of alignment
15 other sections not shown
3-dimensional alignment AASHTO accident costs alleles applied attribute table backtracking bridge costs bridges and tunnels Brookeville cell chromosome circular curve computation coordinates cost functions cost items crossover curvature decision variables denote developed diamond interchange digitized dynamic programming earthwork cost earthwork volume encoded end points environmental estimating existing road floodplains formulated genes genetic algorithms genetic operators given in eqn global optimum grade separation ground elevation highway alignment optimization interchanges intersection optimization intersection points length-dependent cost linear linear programming located location-dependent cost MDProperty View method minimum mutation non-backtracking objective function objective value obtained offspring optimization model optimized alignment optimized solution parameters penalty cost planar interpolation population problem right-of-way cost scenario search space segment selected shown in Figure sight distance solution algorithm station points structures study region superelevation tangent section test example total cost traffic transportation unit cost user costs vector vertical cutting