Your recommendation on non-congested roads is vague and I don't think your recommendation for congested roads conflicts with my critique of js2. Certainly, it's often impossible to see 200 yards ahead on various stretches of the highway, so any reasonable driver will be violating js2's advice if they follow yours.

If you think putting sufficient distance between you and the car in front is vague, you are a poorly educated driver and most likely a dangerous one.

If you can't see 200 yards ahead, you should not be travelling at a speed which precludes you from stopping within 200 yards.

On a single lane uncongested road, there's no excuse for putting a reasonable (at least 3 second) gap between you and the vehicle in front.

> If you think putting sufficient distance between you and the car in front is vague, you are a poorly educated driver and most likely a dangerous one.

Huh? The whole context of this discussion starting from js2's comment is about exactly how far is should be, and in particular whether 2 seconds or 4 seconds (which at highway speeds is 50 yards vs. 100 yards) is more reasonable as a rule of thumb. As you can see from my link, most government safety organizations recommend 2 or 3 seconds in good weather.