Smiljan M. Vukanovic

Modeling route choice with advanced traveler information by Fuzzy Logic

This paper develops a travelers’ route choice behavior model when using an advanced traveler information system (ATIS). The model is tested with data obtained from a computer simulation. The papers point of departure is that immediately perceived travel time along different routes, previously gained experience, and the degree of preference when choosing a specific route are characterized by fuzziness. The travelers’ route choice behavior model thus developed is based on fuzzy logic. The results obtained using the model show exceptionally good agreement with results obtained using computer simulation.

SPATIAL ASPECTS OF TRAFFIC CIRCULATION: I. A REVIEW OF ALTERNATIVE SYSTEMS

One of the key aims of traffic management is to encourage drivers to follow an efficient routing pattern (i.e. a set of routes that collectively minimise the potential for delays and accidents and possibly also minimise travel distance). At present, little is known about the relative merits of different patterns or how they could be accommodated or encouraged within existing city centre networks. A number of archetypes are compared using total vehicle conflicts and total travel distance as the main criteria. They include several that have not previously appeared in the literature, and, the conflicts are weighted to reflect variations in the severity of the interactions between vehicles carrying out different turning movements at junctions. The results indicate wide variations in the characteristics of different routing patterns and suggest new ways of organising the spatial pattern of traffic circulation as possible alternatives to the conventional gyratory system.

Optimal locations of emergency service depots for private cars in urban areas: case study of Belgrade

In a great number of cities, with an increased degree of motorization and urban sprawl, an increased number of emergency calls involving private cars which had a breakdown or accident has been observed. If a city has only one emergency service depot, the service time is usually very long. By decentralizing the emergency service system, the average service time is reduced. This paper deals with the problem of determining the number and locations of emergency service depots for private cars in Belgrade. In this connection, an appropriate simulation model was developed and tested on real data pertaining to Belgrade which has a centralized system.