Verification of Census Devices in Transportation Research

Abstract

Abstract. The article presents a comparison of three devices and two methods that are used to count traffic flow. All measurements were carried out at a roundabout in Ostrava, where the following devices were used: Viacount II, Icoms TSM-SA, and Nu-Metrics NC-200 traffic analyzers. The methods of manual counting of vehicles and of counting vehicles based on video footage were used. The article also provides a comparison of the results obtained, namely in terms of traffic intensity, and of the measurements of the length and speed of vehicles. Further, we evaluate the results and explore the deviations from reality and the reasons why they occur. The article concludes with the recommended procedure designed to eliminate the identified problems, in order to ensure the most accurate results, with no significant deviations.

An Analysis of Traffic Conflicts as a Tool for Sustainable Road Transport

“…Each of the mentioned types of equipment has its limits, which are specified in more detail, for example, in [6]. For these reasons, the analyses involved a combination of individual devices, which were subsequently installed on selected monitored turbo-roundabouts.…”

“…This is followed by the gradual start of the vehicle (5) in the inner lane. The vehicle exiting the roundabout still interferes with the inner lane of the circulatory roadway (6). The vehicle in the inner lane leaves the roundabout at the next exit (7).…”

“…This is connected to space requirements, economic problems and the already mentioned negative environmental consequences, accidents, etc. Unfortunately, supply (in road transport, this means the variety of roads) exceeds demand (i.e., an increase in the number of vehicles on the roads), which, in turn, generates the need to increase supply, and then demand increases again; the conditions of such a system may become unsustainable [6].…”