By Genevieve Theriault
From the roof over our heads to the ground under our
feet, asphalt plays an integral role in modern-day society. Beyond these
practical uses, asphalt has come to serve as a tool to bring communities
together, increase traffic safety and improve infrastructure across the U.S. as well as internationally.
Evolution in road structural
By Bob Humer, P.E.
From ancient times until the 1920s pavement structures were designed based on experience. Stone-paved streets originating 6,000 years ago in Mesopotamia (modern-day Iraq), were later followed by the Romans constructing more elaborate stone-paved roads with thick crushed base layers for drainage.