Which of the following is not a function of pavement markings?

Pavement markings serve multiple important functions to enhance road safety and navigation for drivers. They provide guidance by indicating lane boundaries and directing drivers on the correct path through intersections and road sections. Markings also indicate the alignment of the road, helping drivers to understand the curves and twists of the roadway, which is vital for maintaining safe driving practices.

While designating parking spots is indeed a visible function of road markings, it is typically a more specific application of pavement markings rather than a broad function traditionally associated with them. The main purposes of pavement markings include guiding drivers and indicating road features but do not encompass parking designations as a foundational function. Therefore, identifying parking spots does not fit in with the primary roles that pavement markings play on roadways.