Page 109 - RoadCem Manual - PCT BV
P. 109
Road Function
Design Class
Tr
P
S
Te
Tr = Trunk
5.1.4 The Challenge
P = Primary
S = Secondary
A B C D E
Te = Tertiary/access
Table 5.1 Road Functions and Classifications.
A number of factors combine to pose a major challenge to road provision. In this regard the following aspects are important:
• Available resources are severely limited.
• Social and developmental benefits are often dealt with inadequately in traditional investment
appraisal methodology.
• There has been a tendency to focus predominantly on the technical aspects, with inadequate attention being paid to the other environments within which they operate and which influence their long-term sustainability.
• Traditional highway engineering, planning and standards that are applied to roads are often not appropriate
• Although traffic volumes may be relatively low, vehicle loads are often high, with significant overloading. This makes the relatively light pavement structures that would otherwise be appropriate, vulnerable to overloading.
• Other challenges are also present in many parts of the world as is shown in the figure 5.6 on the next page.
109
