Modern society is facing the reality of living in a world suffering the consequences of past negligence regarding environmental issues: as the awareness of natural resources limitations increases, governments are implementing measures to contain the progress of the environmental damage. In transportation (one of its main contributors), this leaded to the creation of regulations aimed at decreasing fuel consumptions and pollutant emissions. Intelligent Transportation Systems are able to tackle this challenge, mainly because they have a potential to enable more environment-friendly driving patterns. In this work, a cooperative smart intersection concept, inducing a smoother driving style, was deployed and tested under real-life driving conditions. Furthermore, simulations were performed to investigate how this application would interact in relation to the association with hybrid technology. The outcomes, besides providing indications of the application impact on the single vehicle, highlight that a high penetration rate is mandatory for complete application success.