What is the significance of the control points in highway construction?

Control points in highway construction are crucial because they serve as fixed reference markers that establish the correct elevations and alignments for the project. This ensures that the road is constructed according to design specifications, which is vital for the roadway's functionality, safety, and overall structural integrity. The use of control points allows surveyors and engineers to accurately measure and create the horizontal and vertical alignments necessary for the road's geometry, ensuring that the roadway conforms to the intended design and meets operational standards. This precise alignment is important not just for current construction but also for future maintenance and any potential modifications to the highway.