Whenever a road is built or worked on, a worker is looking through one of those telescopes on a tripod. I assume they are surveying or measuring straightness. please?
In: Technology
They are measuring distances in three dimensions, up and down, near and far, and side to side. Roads have to conform to certain standards, which are determined by engineers. The standards determine things like how hard it is for a vehicle to go uphill (grade) and how the road sheds water (to make it safe for driving.) The measurements that the surveyors make help the road builders to keep their construction in conformance with the standards.
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