Two

These Cat 150 Graders are working in the crown of a new road. Every road should have a crown in it. The middle of the road is slightly higher than the shoulder for water displacement. These graders are both equipped with GPS receivers on the masts but the on the right (looking at them from the front) also has a Trimble sonic tracer equipped. This sonic tracer follows the curb line using eco poisoning, or sound bouncing.
#caterpillar #grader #dirtwork #earthworks #constructionequipment #constructionlife #construction #drone #dronevideo