Which of the following statements is true about crosswalks at an intersection?

• Crosswalks only exist at intersection with markings.
• Crosswalks do not exist without proper markings.
• Crosswalks exist across most intersection regardless of markings.
  Explanation:

  "Crosswalks may be marked on the pavement surface; however, at most intersections, a crosswalk is implied even in the absence of markings."
• Crosswalks are limited to marked pedestrian areas only.