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- W618457536 abstract "A substantial amount of research is now devoted to finding 'optimal' sets of transport policies, using a formal optimisation process. For example, a specific application of this method was used in the European Union (EU) FATIMA project. At the heart of this method, there is a process whereby actual policy objectives are translated into objective functions, which include trade-offs between 'good' and 'bad' outcomes of any specific combination of policies. This paper discusses 'constraints' in these objective functions, which enable undesirable or infeasible sets of transport measures to be discarded in the optimisation process. It first surveys the types of constraints that can be used, including 'hard' and 'soft' constraints. It comments on the advantages and disadvantages of these two types of constraint, from the viewpoints of transport policy and practical computation. It then summarises the basic optimisation algorithm as used in the OPTIMA project that preceded the FATIMA project. Three of the objective functions used in FATIMA are listed, to illustrate the importance of the concept of constraints. Some examples are given of the improved optimisation algorithms used in FATIMA, which attempt to overcome the deficiencies of the OPTIMA algorithms. The great potential of this optimisation approach is indicated. For the covering abstract, see IRRD E101143." @default.
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- W618457536 date "1998-09-01" @default.
- W618457536 modified "2023-09-24" @default.
- W618457536 title "THE USE OF CONSTRAINTS IN METHODS TO FIND OPTIMUM TRANSPORT POLICIES" @default.
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