You should never stop or park or allow your vehicle to stand idling:

• Within 30 feet of a place on the curb immediately opposite the end of a safety zone
  Explanation:

  "Do not park, stop, or allow your vehicle to stand idling within 30 feet of a place on the curb immediately opposite the end of a safety zone."
• Within 100 feet of a stop sign
• At any place where an official sign allows parking
• In designated parking spaces