However, it said, during the process of award of contracts, the ADB changed the design At Grade BRT corridor in Reach 1 and 3 from full width rigid concrete pavement
to lane strip pavement concrete based on concept that a drainage of BRT corridor shall be provided through a bio-swale in between the lanes strip, which would allow the seepage of water into the sub soil.
Sidani is also instructed to construct 800 meters of roads in linear length, using rigid concrete pavement
at 200 millimeters or 8 inches thickness instead of 1km in order to reach a compromise in terms variation.
"Research indicates that; rigid concrete pavements
dramatically reduce fuel consumption which in turn reduces GHG emissions, provides thermal value when used in buildings regarding heat and cooling requirements reducing energy consumption and additional GHG production.