Refined vehicle and driving-behaviour dependencies in the Versit+ emission model
TNO Bouw en Ondergrond
The demand for local and time-dependent emission predictions, in combination with new time-dependent modal-mass and mobile PEMS measurements induced major changes in the VERSIT+ emission model of TNO. The current version is the third, after the second major revision and has two major differences with the previous approach. First, an individual analysis is added of each of the more than 3200 vehicles in the measurement programme, to separate properly the vehicle dependence from the driving-behaviour dependence. The other development is a closer linkage to instantaneous emissions depending on velocity and acceleration. This enables the use of both modal mass measurement data and the older bag data in the same model. Due to the improvements, the VERSIT+ is now tuned toward the future. The model enables the consistent calculation of road traffic emissions for a wide range of different real world conditions. Accurate emission factors for national emission inventories can be calculated, but also the effect on the local emissions due to traffic measures can be evaluated.
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Road traffic emissions
Actes Inrets, 1-8