Final answer:
The most common distance vehicles should be parked from a fire hydrant is 15 feet, but local regulations may vary.
Step-by-step explanation:
The question regarding how many feet a vehicle should not be parked from a fire hydrant pertains to traffic laws and regulations. The standard distance required for parking away from a fire hydrant can vary by jurisdiction, but the most common distance is 15 feet. It is imperative for vehicles to maintain this distance to ensure that fire services have unrestricted access to hydrants in the event of a fire. In some cities, the requirement might be slightly more or less, so it is crucial to be aware of and comply with local parking regulations.