Is there any exception to the 2-second rule for following the vehicle in front of you?

• Drivers of smaller vehicles are exempt from this rule.
• Drivers of large vehicles like SUVs are exempt from this rule.
• Drivers of large vehicles like motorhomes are exempt from this rule.
  Explanation:

  "The 2-second rule is a general guideline for safe following distances, but drivers of large vehicles like motorhomes should follow a minimum 4-second distance to allow for longer stopping times and to account for their vehicle’s size and weight."
• Aged drivers are exempt from this rule.