Final answer:
Vehicles parked parallel to a curb must typically be within 18 inches of the curb, though this distance can vary by jurisdiction. It's a regulation that aids in maintaining traffic flow and pedestrian safety.
Step-by-step explanation:
When you park your vehicle parallel to a curb, the legal requirement in many jurisdictions is that your wheels must be within a certain number of inches from the curb. While this distance can vary from place to place, a common standard is that the wheels should not be more than 18 inches from the curb. This regulation helps to ensure that the vehicle is parked in a manner that allows the free flow of traffic and pedestrian movement and adheres to local traffic laws.