**4.1 The Orbicity modelling family**

We have developed a family of models called Orbicity, designed to study ring-shaped mobility services in urban environments. As of early 2020 the family comprises three models:

• a *taxi service*: vehicles take individual clients, picking them up from their start point and dropping them off at their destination [1].

b. The technology corresponding to the mode of transportation: vehicle capacity (factor *K*), type of motor (combustion engine or electric),

c. Territorial conditions: size of the ring (circumference C or radius *R*),

average speed of travel (parameter *v*0), demand function.

This upper level thus determines the strategic conditions of the service. For the

**Figure 4** shows the chain of causation which determines the traffic conditions.

service operator, this is a matter of strategic marketing. For a public authority responsible for coordinating sustainable mobility, it is a matter of strategic

**Figure 3** offers a schematic representation of this four-tier architecture.

The traffic model establishes a 'stochastic equilibrium' for the availability of

driving technology (human or robotic).

**4.3 Indications regarding the traffic model**

*Towards Shared Mobility Services in Ring Shape DOI: http://dx.doi.org/10.5772/intechopen.94410*

planning.

**Figure 3.**

**Figure 4.**

**173**

*Systemic diagram of the traffic model for a ring-format shuttle service.*

*Four-tier architecture.*

