The Rotterdamse Inwinning op het Onderliggend wegennet (RIO) project was a collaboration between the dienst Stedebouw en Volkshuisvesting (dS+V) of the Municipality of Rotterdam and the Provincie Zuid-Holland in the Netherlands. The aim of the project is to study the type of information that can be obtained from an ANPR-based JTMS, and how it compares with, and complements, the information that can be obtained from other traffic sensors, such as inductive loops. NCTR has supplied all the instation and outstation software for this system.
In addition to the measurement of journey times, the general data transport capability of NCTR’s communication architecture is used to carry data from loop counter/classifiers at each outstation to the instation.
The ANPR data are encrypted at the outstation and transmitted to the instation in the dS+V’s offices, where they are decrypted and analysed to obtain journey times. The system is monitored through a Web-based user interface which is accessible to users on the local area network in the dS+V’s offices in Rotterdam. The loop data collected from the outstations are also available from the instation.
This is a typical snapshot of the user interface, showing congestion during the morning rush-hour affecting several routes:
By clicking on an affected route, the operator can obtain more detailed information about the congestion, including a graph of journey times over the last eight hours.
This is a typical profile of one of the routes (labelled with a median journey time of 3 minutes 22 seconds) on the above map. It is a short route (1.7 km) and the graph shows the rapid onset and dispersal of morning rush-hour congestion along it.
The RIO screen snapshot and journey-time data are shown by courtesy of the Municipality of Rotterdam.
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