Title: Deriving accurate flow data for unmonitored links
Abstract: The National Traffic Control Centre (NTCC) collects traffic data in real time. About 1300 have installed monitoring equipmentbecause, at the design stage, it was not considered cost-effective to build equipment there. These locations use data derived from elsewhere on the network. When NTCC first began to collect and report traffic flow data, the accuracy of the data. come cases, extremely poor. In order to remedy the situation, a major review of the generation of all flow data was commisioned, which led to an analysis of the errors in derived data and the introduction of a set of rules governing the use of Agency has classified the different roads within its jurisdiction as 'A', 'B' or 'C', according to the importance of the routes. The required accuracy for each of the three categories is different. increase in the magnitude of the errors in derived data. Each has been considered in turn and in errors and the accuracy of derived data now meets the required standards.
Publication Year: 2008
Publication Date: 2008-03-01
Language: en
Type: article
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