Abstract
Abstract In this paper the results of an experimental survey on traffic monitoring devices, named SMART Project, are presented. Aim of the project was to define the requirements to be applied to traffic technologies to match specific applications. The project involved the construction of a test site on a main road, where seven different traffic monitoring systems were installed. A 1 year survey was carried out to assess technologies response to environmental and mechanical solicitations. A reference system specifically devoted to check and validate the devices under test was designed for the project. Test procedures were also developed to control the results achieved. The outcomes accomplished for vehicles counting are described in details in the essay hereunder.
Highlights
Traffic monitoring is a crucial task road agencies have to perform in order to improve operational and planning activities, as well as to supply policy makers reliable data to be used when attaining strategic decisions
The vehicular counting accuracy of the monitoring systems can be evaluated by collecting data over many time intervals; for the k-th collecting interval, the relative error due to each system can be expressed as follows: estr ;k nstr;k À nrif nrif ;k where: nstr,k indicates the number of counted vehicle provided by the testing technology; Fig. 3 Global results related to the laser scanner system tested in the survey nrif,k is the manually counted reference number
Seven different systems were tested for a period of 12 months under different traffic and weather conditions
Summary
Traffic monitoring is a crucial task road agencies have to perform in order to improve operational and planning activities, as well as to supply policy makers reliable data to be used when attaining strategic decisions. Since 1970, the annual traffic census is accomplished according to EEC
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