In this work, an eco-driving rating based on the relation between fuel consumption and average trip speed commonly used in traffic engineering is presented. A car following experiment with a driving simulator was used to make an eco-rating chart. The leading car was used to control average speed of each experiment. To calculate the rating, the resulting driving data was divided into trips. For each trip, low level of fuel consumption was given high score while high level was given low score. Rating was given as average of the trip scores. Actual driving data was then used for the leading car for evaluation of the rating. One of the desirable properties of the rating proposed by this work is consistency regardless of traffic conditions. As suggested by the rating chart, it was found that the proposed eco-rating is consistent in terms of ranking drivers around when average trip speed is around 50-70 km/h.
Driver behavior is the key to safe mobility. In general, vehicle maneuvers can be determined from acceleration of the vehicle. Physically, the acceleration and brake can be detected with longitudinal acceleration while turning and lane change can be detected with lateral acceleration. Nowadays, navigation system technologies have been much improved both on availability and accuracy with combination of multiple navigation satellite systems. Normally, it’s called Multi-GNSS (multiple global navigation satellite system). With decimeter precision and the update rate scale up to 10-Hz, the GNSS could be an alternative solution for driver behavior detection. In this paper, advance Multi-GNSS with precise point position (PPP) technique was presented with a simple maneuver detection algorithm. The advantage of PPP over conventional navigation is decimeter accuracy without direct connection to any reference base station. The experimental Multi-GNSS receiver was JAVAD Delta G3T that installed on a utility vehicle. This high performance multi-GNSS navigation system was investigated with the driving behavior detection algorithm. The precise point positioning (PPP) technique in combination with multiple satellite navigation system (GPS+GLONASS+GALOLEO+QZSS) were applied in this study. The PPP technique improved the output of detection algorithm in acceleration limit from 260% error in conventional navigation system (GPS) to 20% of incidents with PPP.
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