A dark ramp meter and a dark intersection traffic signal do not mean the same thing. What is the correct distinction?

1. At a dark ramp meter, proceed by merging or yielding as conditions allow; at a malfunctioning intersection signal, treat the intersection as an all-way stop unless another control applies
2. Both always mean accelerate without yielding
3. A dark ramp meter requires a U-turn, while a dark intersection signal means green
4. Both always require parking on the shoulder for 10 minutes