Semi-Rigid Pavements are not a common type of pavement structure.

The subgrade serves multiple functions in a pavement structure, including providing structural support, controlling moisture and drainage, and distributing loads to the underlying soil.

Crushed Stone is a common material used as the base course in flexible pavements.

Reinforcing steel is added to concrete pavements to increase flexural strength, reduce cracking, and improve load-bearing capacity.

The thickness of a pavement structure is influenced by multiple factors, including traffic volume, subgrade strength, and climate conditions.

Cutback Asphalt is not a common type of asphalt binder.

The primary purpose of a tack coat is to improve adhesion between layers in pavement construction.

Rutting, Cracking, and Potholes are all common types of pavement distress.

Rutting in asphalt pavements can be caused by excessive traffic loading, weak subgrade support, and high temperatures.

Scarification is not a common type of pavement maintenance activity.

Pavement condition surveys are conducted to assess the current condition of the pavement, identify areas in need of repair or maintenance, and plan for future pavement rehabilitation projects.

Reconstruction is not a common type of pavement rehabilitation technique.

Pavement management systems aim to optimize pavement maintenance and rehabilitation strategies, extend the service life of pavements, and minimize life-cycle costs.

Traffic Volume is not a common type of pavement performance measure.

Pavement research aims to develop new and improved pavement materials and technologies, evaluate the performance of existing pavements, and identify factors that contribute to pavement distress.