Summary
The traffic control is an essential part of autonomous movement of different kinds of vehicles in a virtual model of a (real) city. By the traffic control we mean not only collisions avoiding and optimal setting of traffic lights. The movement should be realistic enough too, so traffic (together with changing day-time/night-time and seasons of the year) significantly improves feeling of reality for a virtual visitor. This paper describes some implementations of the city traffic in the project named Praha4D (www.Praha4D.net) aimed at the city of Prague and its historical development.
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Extract
Traffic Control in Virtual Model of a Real City
1. Introduction
There are already several virtual models built for many cities (e.g. [1], [2], [3]). Some models are available on Internet; many of the better quality are offline only with snapshots and short animations available online. Models vary in size and level of detail incorporated but they are gradually getting larger and better.On of the possibilities how to upgrade the quality of a model is to incorporate a realistic movement of different kinds of vehicles. A good model of a living city needs cars going through its streets, queuing in traffic jams and giving way to each other and to trams. Trains should be approaching and departing railway stations and ships sailing away out of its ports. Live traffic significantly improves feeling of reality for a virtual visitor. Several physical engines for simulation of natural behavior were already developed for games or serious industrial simulations (e.g. [4], [5]). Those engines deal with physics in all its complexity (rigid body physics, collis...See the full content of this document
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