1.ประเภทถนน
-Flexible pavements. Those which are surfaced with bituminous (or asphalt) materials. These types of pavements are
called "flexible" since the total pavement structure "bends" or "deflects" due to traffic loads. A flexible pavement structure is generally composed of several layers of materials which can accommodate this "flexing".
-Rigid pavements. Those which are surfaced with portland cement concrete (PCC). These types of pavements are called
"rigid" because they are substantially stiffer than flexible pavements due to PCC's high stiffness