Developing an Object-Oriented Testbed for Modeling Transportation Networks
نویسندگان
چکیده
The objective of the paper is to discuss the development of an alternative representation of the transportation network using object-oriented GIS. This representation is important for the supply side of transportation planning and modeling. Object-orientation provides a way of solving the problem in a planar network for routing. It can facilitate the calculation of detailed network characteristics using properties such as inheritance and polymorphism. This representation is also closer to human perception of a transportation network. It is argued that by using an object-oriented GIS we can facilitate path selection using different criteria. We experiment with the design of the object-oriented system by developing an object-oriented representation of a transportation network and incorporating different path selection algorithms based on various behavioral assumptions. It is especially useful in the design for a versatile ATIS. Introduction: Transportation Science is host to a variety of theories concemkng (among others) network structure, routing algorithms, traveler activity pattems, mode choice, demand forecasting, vehicle or traffic assignment, trip allocation, and traveler behavior. It has an expressed goal of increasing accessibility for all groups of people with regard to the environments in which they live and interact. A significant component of these goals is to further develop Intelligent Transportation Systems (ITS) through multi-level and multi-modal research and testing. This includes contributing to research on transportation system architecture, technology development, policy formation, and operational tests of vafous systems. ITS objectives aim at utilizing advanced communication and transportation technologies to achieve traffic efficiency and safety. There are different components of ITS, including Advanced Traveler Information Systems (ATIS), Automated Highway Systems (AHS), Advanced Traffic Management Systems (ATMS), Advanced Vehicle Control Systems
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