PURPOSE OF THE TOPIC
Just like it was underlined in the heading of this thesis, we
will attach throughout this work to seek if the profile across a roadway in
urban environment has an impact on its output.
The aim had here is that of presentingthe importance of the
hierarchisation of the roadway network system of a city and the impact of its
presence or absence on the functioning of the town. Indeed space being one of
the major factors or the most important limiting factor of urban environment
growth's, it is question of building roads allowing to evacuate a more or less
important flow of vehicles and this with an optimal width because if the road
is narrow, the evacuated flow is reduced and it is the function, the utility of
the road which is called into question; on another side, if the road is too
broad, the economic and socialaspects are the problems because of the costs of
construction, of the operations of expropriations, compensations and
displacements of the bordering populations.
The present study finds all its importance in the fact that it
makes it possible to show the narrowness relation existing between the category
of a way in urban environment, its width and its output. All this having for
finality a profit so much on the financial plan, sedentary and social when
designing and/or the refitting urban roads by the various competent services.
Thus, instead of increasing a road independently of his category or his
localization, we could either make particular lay out or to organize it better,
which would make it possible to make important financial profits or then if
necessary to precede any enlarging or installation work by a study of traffic
in order to estimate and to envisage the efficiency of the aforesaid work.
RESEARCH QUESTIONS
What is the impact of the type of a cross sectional profile of
a road in a urban zones area?
This main research question intends to answer the following
specific research questions:
· Does the categorization of a roadway system of an urban
area have an importance?
· Does the cross sectional profile, the width of a road
and the various installations that it has, change its functionality in the
urban area?
FORMULATIONS OF
HYPOTHESIS
It is reminded that throughout our study we will limit
ourselves to road infrastructures in urban environment. Indeed the hypothesis
on which the present report will be based is the following one: the
type of the cross sectional profilesof a roadway on urban zone have an impact
on the output of the aforesaid road.
· The categorization of a roadway system of an urban area
has an importance.
· The cross sectional profile, the width of a road and
the various installations that it has, can change its functionality in the
urban area.
FORMULATION OF RESEARCH
OBJECTIVES
The main objective of this study is to present the impact of
the cross sectional profile, the width of a roadway on the efficiency of a road
in urban environment
In order to ensure this study, meet its purpose, the specific
objectives are:
· To underline and to present the importance of the
hierarchisation of the lanes in an urban environment, then we will list the
various parameters entering the process of hierarchisation of a lane in urban
environment.
· Present a standard cross sectional profile, a width of
a road and various installations that can change its functionality in the urban
area. By-there, we intend to define for example, a number of ways having each
one a precise function and according to the case allocated with a particular
traffic (private cars, exclusive right of way, two wheels, etc.); once this
traffic, this use to determine, we will allow ourselves to propose a
dimensioning, a standard structure to adopt.
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