Study the sign shown. Which MUTCD application matches this device?
Whenever traffic should merely slow for a curve
Only to show that cross traffic has a parking facility
When a full stop is always required on the approach✓Correct answer
When a primary traffic signal lacks sufficient approach visibility
Explanation
The MUTCD specifies the R1-1 STOP sign when a full stop is always required on that approach. The curve-warning, parking-guidance, and signal-ahead applications belong to different traffic-control devices.