When can non-HOV vehicles use an HOV lane designated by a diamond symbol on city streets?

• Only during rush hour
• If they are making a right turn at the next intersection
  Explanation:

  "You can only use HOV lanes if your vehicle meets the requirements indicated by signs during the specified times. On city streets, sections of the solid white line separating these lanes from normal lanes may be broken. In these areas, non-HOV vehicles can enter the HOV lane to make a right turn at the next intersection."
• If they have special permission from the city
• If they are traveling at a high speed