Limits and flows

Par Mathieu Stutz, Ozan Bakir, 19/10/15

A lot of people walk every day in the streets of Lausanne and Paris and so in Avenue Georgette and Boulevard Sébastopol.

This creates a flow in both streets but with a different rhythm. The hybrid street composed of those in Paris and Lausanne shows the directions of these flows and the limits they can not cross over. But what are these limits?

First, what is this flow?

The flow is the path of the people on the sidewalk and the cars on the road defined by vectors.

To define these vectors, we need to analyse the limits of the flow.

The first limits are the two buildings in each corner of our little part of the street.

In Paris, the vector of the walk of the people on the sidewalk follow an arc and the same for the cars.

plan de paris

plan de paris

In Lausanne, the vector of the flow goes straight near the facade. But there are disturbances. The people can only walk in the public spaces, so they can not climb to the first floor. Here is another limit.

moule de lausanne

moule de lausanne

They can break this straight flow and enter in the building, where there is a butchery. The flow stops here. They can also walk to the bus stop and stop here too. These are others limits.

plan de lausanne

plan de lausanne

Here is the tool we created to take measures of the facade of Lausanne for the elements too high to be measured from the ground:

outil de mesure

outil de mesure

The grouping of some possible flows give something like this:

flux à lausanne, 1:33

flux à lausanne

This is the space in which the flow goes:

lausanne, 1:66


lausanne depuis paris, 1:66

vue de lausanne depuis paris

perspective de lausanne avec point de vue à paris, 1:66

perspective de lausanne avec point de vue à paris

Here is what the people see from the butchery:

paris depuis lausanne, 1:66

vue de paris depuis lausanne

perspective de lausanne avec point de vue à lausanne

perspective de paris avec point de vue à lausanne

There is one last limit. The flows go along the street and do not cross the street in order to make Paris and Lausanne communicate.

Let’s now generalize these possible flows in both streets and regroup them into vectors considering theirs limits:

hybride, 1:66


hybride, 1:66


Finally, we clearly see the vectors of the flow on the hybrid and also the limits the flow can not cross as the two cities can not be connected by this flow.