GENERAL CONCLUSION AND
RECOMMANDATIONS
4.1. Recall of the working hypotheses.
The starting point of this work was a rather simple and
alleviating statement: the cross sectional profile adopted for a road has an
impact on the efficiency of this road in urban environment. In order to be able
to bring answers to this question, we have begun researches which have deviate
from this starting assumption. Now, the question around which our work was
going to articulate was:what is the impact, the importance of the
hierarchisation of the highway network in an urban area? Differently summarize,
this new assumption, bases of our work would be of knowing what is the
importance of the function of the roadway system on its form (width) in urban
environment. This new question having been directed by a rather favorable
context general that by its rather relevant problems, the second phase at which
we had arrived (after the determination of this question) was to carry out a
review of the literature which would be articulated around the urban roadway
network in particular on its design, its function and its organization.
In this part, through the various articles, documents and
theses consulted, we presented the elements on which former work had dwelt too
long in particular on the design of the urban roadway system, its various
functions and how to organize it in order to make it efficient.
In order to be able to confront our assumption with reality,
we should consequently carry out the development, the design of a model.
However, at the time of the investigations of data acquisition, it was brought
back to us the availability of a document: Elaboration du plan de
déplacementUrbains de la ville de Yaoundé, which
was worked out in 2010 by the grouping Louis Berger/Beta
Consult.
We thus decided to use the data and results of investigations
contained in this document and this because of quality (detailed and veracious)
of the data and of their relatively recent age (5 years from 2010 to 2015).
This forced us to re-examine the model checking of the
assumption that we had fixed ourselves at the beginning. It is thus as in order
to be able to conform us to this news gives, we would base on the document
referred to above more precisely we would adapt our assumptions has those which
were formulated in this document. Thus our new models will relate to:
· The legibility and functionality of the plan of the
city and this through data on the quantitative and the qualitative roadway
network system of the town of Yaoundé;
· Thefunctioning of the transport system of the city
through a model of simulation of traffic.
· The road safety through a simulation of the conditions
being able to lead to a confrontation.
Once these various modelsadopted, it was a question for us to
pass to the presentation of the results of the investigations on site in order
to be able to confirm or to refute our basic hypothesis.
Thus at the end of this exercise, this reveals that the
hierarchisation of the roadway network system in an urban environment has
indeed a rather important impact on the aforementioned environment.
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