"In the European Union, while pedestrian fatalities decreased over the past decade, their relative percentage in respect to all traffic fatalities slightly increased. Worldwide, the share of the pedestrian problem, in road accident injury, has not shown any significant change or improvement in the last few years. Furthermore, considering the constantly increasing tendency towards vehicle automation, it is even more important to understand, quantify, and model road users comfort zone boundaries. Comfort zone boundaries turn out to be relevant regions for enabling automated vehicles to drive in such a way that users feel both safe and comfortable. Considering that safety research has thus far been focused on the interaction between drivers and pedestrian in the intersection scenario, the aim of this project has been to provide information about relevant safety metrics in the longitudinal scenario, i.e.