“…Several such systems have been presented and evaluated in the literature. The majority of eco-driving support systems display information on fuel consumption (Boriboonsomsin et al, 2010;Hiraoka et al, 2009;Jenness et al, 2009;Manser et al, 2010;Meschtscherjakov et al, 2009;Stillwater and Kurani, 2013), but there are also systems that are targeted at giving advice or feedback on driving behaviour, such as accelerations and decelerations van der Voort et al, 2001), speed (Trommer and Höltl, 2011), throttle pedal pressure (Azzi et al, 2011;Jenness et al, 2009;Larsson and Ericsson, 2009;Meschtscherjakov et al, 2009) and gear shifting (van der Voort et al, 2001). Another type of eco-driving system evaluates the overall driving performance and presents it to the driver for example as an ''eco-index'' (Jenness et al, 2009), a changing colour (Azzi et al, 2011;Jenness et al, 2009;Meschtscherjakov et al, 2009;van der Voort et al, 2001) or as a symbol (Jenness et al, 2009;Meschtscherjakov et al, 2009).…”