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This document provides the traffic efficiency and environmental impacts assessed in the euroFOT project. Traffic efficiency effects on mileage, speed and travel time are assessed, as well as effects on a change in congestion due to a change in number of accidents. The environmental effects on fuel consumption and CO2 emissions due to a change in mileage and driver behaviour are assessed. FOT data are used to evaluate these effects, in some cases complemented with traffic simulation models. In the euroFOT project the traffic efficiency and environmental impacts of five functions are assessed. For three other functions only the indirect traffic effects are considered. The results are scaled to provide the insight of the impacts projected on a European scale. The EU-27 results are input for the cost benefit analysis carried out in work package 6500. The eight euroFOT functions are the following: •Functions for which the traffic efficiency and environmental effects are assessed: Adaptive Cruise Control (ACC) and Forward Collision Warning (FCW) together in one bundle. Speed Regulation System (SRS): Speed Limiter (SL) and Cruise Control (CC) •Navigation Systems (built-in device and mobile device) •Functions for which only environmental effects are assessed: Fuel Efficiency Advisory (FEA) •Safety warning functions, for which only safety effects and indirect traffic effects are assessed. No direct traffic efficiency or environmental effects were expected: Lane Departure Warning (LDW)/ Impairment Warning (IW): tested separately and in three different bundles – with ACC, with ACC and FCW, and with ACC, FCW, BLIS  and IW. IW is only tested in a bundle together with ACC, FCW, LDW and BLIS Curve Speed Warning (CS): tested separately. Blind Spot Information System (BLIS): only tested in a bundle together with ACC, FCW, LDW and IW. First the effects of the systems measure in the FOT are presented, followed by the EU-27 level results. As a context for the results, this summary ends with data on system usage.