Transportation Network Analysis
Wiley, 21. apr. 1997 - 216 strani
The fabric of all societies is held together by networks of various kinds, such as water supply, energy supply, sewage disposal, communication and, perhaps most importantly, transportation. Transportation Network Analysis is concerned primarily with the spatial, but also the temporal, nature of the movement of people and freight across land, where the movement is channelled onto roads or railways. The road and rail infrastructure constitute the transportation network while the movement of people and freight constitute the flows on the network. Providing a coherent theoretical framework, this book focuses on three interdependent aspects of transportation networks: state estimation the estimation of path flows, vehicle queues, stops and delays; route choice link cost functions and the equilibrium principle; and network design traffic signal control, link design and link insertion or deletion. While the treatment of transportation networks is general and not specific to one mode of transport, the emphasis is on private transport by road networks with extensions to public transport indicated where appropriate. Numerous examples illustrate both definitions and algorithms.
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algorithm allow approach approximation arrivals assumed average capacity capacity constraints centroid changes Chapter choice column connecting Consider constraints convergence convex corresponding cost paths curve defined definite delay demand density depends destination deterministic user equilibrium direction dual variables effect elements equal estimation example expected expressions feasible Figure fitted fixed given gives implies increasing independent iterative Jacobian leads least cost linear link cost link cost functions link flows logit matrix measured method Minimise namely node Note objective function obtained optimality optimisation problem origin origin-destination pair path costs path flows period positive practical presented probability problem programming proportions queue reduced referred relationship reliability represented respect result sensitivity shown solution speed Step stochastic user equilibrium traffic transportation network trip table trip-makers unique units user equilibrium assignment vector vehicles zero
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