Assessment of traffic operations on motorways: A numerical mapping approach


Type de document
Résumé / Abstract
This paper focuses on the assessment of traffic operations on motorway networks. It presents a tool allowing a reliable assessment of the impacts of these operations based on numerical mapping techniques. The different steps of the methodological approach are first described, starting from the calibration of a fundamental diagram, until the determination of some specific iso-occupancy curves. Maps of traffic conditions are then derived. Quantitative indicators are extracted from the components of these maps. An observatory of traffic peaks is then automatically elaborated allowing a complete assessment of the impacts. The method is illustrated by two examples. The first concerns the impact of a traffic information system composed of variable message signs (VMS) on an urban orbital expressway. The second example analyzes a peak traffic due to leisure trips on an interurban motorway. These tests confirm the potentialities of this new approach to set up an observatory of traffic conditions and to quantify the effects of traffic management policies.

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