Initial Cost Comparison of Rigid and Flexible Pavements Case Study: Khartoum State

Abstract

n Sudan, only flexible pavements are used despite some doubts regarding their economic value under
different conditions. In this paper, the properties and design of cement concrete rigid pavement and flexible pavement
were described. The initial costs of both types of pavements were compared, based on the prices of the Ministry of
Infrastructures and Transportation, Khartoum State. While the soil sub-grade and traffic loading govern the pavement
design, the material composition is the most relevant factor in the comparison. Although only the initial cost was used
for the comparison, it was found that rigid pavements were more economical than flexible pavements regardless of
subsoil conditions for traffic volume less than 3,000,000 ESAL. The preference of rigid pavements will definitely be
more beneficial when the total life cycle cost is considered. It is advisable for road authorities to develop parametric
guidelines regarding the selection of pavement type.