In this paper, we carried out a review of the differences of sustainability and urban sustainable relationships in recent scientific papers. We related some of hose notions to a specific event: crossing the road in places handled by traffic lights. We used an idiosyncratic approach to temporary in the sphere of the above-reasoned relationships. We presented the concept of vertical time opting the traditional view, which we delivered horizontal time. Let’s apply a pair of instances taken from a field Diary Constructed on the basis of Actor-Network Theory (Latour, 2005, 2002, 2001) and certain interpretation of thick description as assumed by Clifford Geertz (2003). We concluded that urban sustainable relations are complex, and in order to understand them it is necessary to take into account human and non-human Mediators; i.e. intersubjectivity and interobjectivity (Latour, 2005).In the following text, we will first remember the concept of sustainability and sustainable urban relations. We will highlight the link between the revised literature and the act of crossing the street at semafologically managed points. We will also offer a different look at time inside urban relational sustainability, which we have called vertical time. In this regard, we will compare our proposal with the most common vision that we decide to call horizontal time. Finally, we will substantiate our arguments with ethnographic notes on the basis of the dense description (Geertz, 2003), although it should be noted that our approach is not anthropological but psychosocial. We will thus take on some of the scenarios of the Actor-Red Theory as a theoretical platform (Latour, 2005, 2002, 2001). By way of conclusion, we state that urban relational sustainability is related to complexity. In order to understand it, it is necessary to consider auxiliary facilities, i.e. human and non-human agents, or as Latour (2005) would say intersubjectivity and interobjectivity.