Jacek Oskarbski

Information System for Drivers Within the Integrated Traffic Management System - TRISTAR

Advanced traveler information systems (ATIS) for drivers are a very important element of modern traffic management. In recent years ITS infrastructure is being developed also in Poland. It allows for delivering to drivers information related to the conditions in the road network through, inter alia, dedicated Variable Message Signs (VMS). Such information enables drivers to take decisions, contributing to improving the efficiency and safety of the transport system. They also allow to manage the traffic speed dynamically, taking into account weather conditions hazards, temporary disruptions or incidents. Paper provides an overview of different solutions for Advanced Traveler Information Systems in Poland. The place of ATIS in architecture of Tri-City TRISTAR system is described as well as the use of data, functions and algorithms that allow them to be implemented. Furthermore ATIS development plans and plans for research to be carried out to improve the functioning of the system are presented.

Reliability and safety as an objective of intelligent transport systems in urban areas

Abstract Technologies that use transport telematics offer tools for strengthening urban transport systems. They rationalise the use of the existing infrastructure and transport management systems, increase their reliability and safety and improve the transport behaviour of residents, while reducing the operating costs of transport. The main reason for using Intelligent Transport Systems (ITS) is the need to implement measures to reduce the negative effects of growing motorization and improve the quality of transport services in response to the fluctuating transport demand. The authors present ways to improve the reliability and safety of transport in the street network by using ITS solutions.

Impact of Intelligent Transport Systems Services on the Level of Safety and Improvement of Traffic Conditions

The positive effects of the services of Intelligent Transport Systems (ITS) on the level of transport systems operation was confirmed by long-term studies conducted, inter alia, in the USA, Japan and Europe. Benefits resulting from the application of ITS services can be presented through performance indicators. The indicators represent in a numerical or qualitative manner to what extent ITS services can contribute to improving the safety of travellers and the quality of travel, upgrading the efficiency and reliability of the transport system, the efficiency of transport services providers, energy saving and environmental protection. The paper presents the impact of selected ITS services on the safety and efficiency of traffic, as well as indicators describing that impact. ITS services were specified according to the standard classification of services, prepared within the framework of the RID 4D research project “The impact of the use of Intelligent Transport Systems services on the road safety level,” funded by the National Centre for Research and Development and the General Directorate for National Roads and Motorways (GDDKiA).

Estimating the average speed of public transport vehicles based on traffic control system data

Intelligent Transport Systems are a valuable source of traffic information, covering both private and public vehicles. The main problem, however, is that very few studies are conducted to determine the speed of buses, trams and trolleys in urban networks in relation to traffic conditions. The paper investigates how ITS systems data could be used to model the speed of Public Transport vehicles. This is now possible thanks to the implementation of TRISTAR, an Integrated Traffic Management System covering the Tri - City (Gdansk, Sopot, Gdynia). The objective of the analysis is to develop a method for modelling Public Transport vehicle speed. To that end data from TRISTAR subsystems were used. The paper explains how various data can be collected, used and combined to develop speed models. The results of analyses and a proposed speed model for Gdynias Public Transport vehicles are presented. This is to be further verified by applying the proposed method in another city or other cities. The speed model can also be used for updating existing public transport timetables. It is also possible to use the speeds for calibrating macroscopic simulation models.

Influence of Toll Collection Method on Motorways on Traffic Safety and Efficiency

The paper presents the results of the effectiveness analysis for various forms of toll collection on motorway gates and their impact on safety and efficiency of traffic. The results from field tests that were performed on the A1 motorway in Rusocin were used for the analysis. The research included the analysis of the video image of driver behaviour on the way to the toll booths and at toll booths. The PTV VISSIM tool was used to analyse the safety and efficiency of the traffic (microsimulation models of the Rusocin Toll Collection Plaza reflecting various forms of payment). The analysis of speed changes, delays, vehicle queues and driver service time has been made, including the method of toll collection (manual, automatic, hybrid). The analysis of traffic safety was carried out using surrogate measures used in the theory of traffic conflicts, taking into account the trajectory of vehicles movement.