^ i see bro, para sa kin kasi and i believe to most, if not all motorists, importante ang turn signals.
we can't assume under low visibility conditions,
we need to know, and that's where a lot of motorists fail (let's admit it, may oras na nakakaligtaan natin, myself included at times) - they fail to signal their intentions if they're exiting a toll way, or planning to pass a vehicle etc. and under low visibility conditions, you can't see far ahead of you so you need as much information about the vehicles around you, hence the proper use of turn signals.
also, if everyone is using their hazard lights, and you stall in the middle of an expressway without a way to make it to the shoulder, how will you signal to people behind you that you're presenting a hazard to them by your vehicle being stalled? or if your vehicle suffers some kind of failure (like say you popped a conrod bearing but you can't stop, and you have to suck it up moving at 40kph where the minimum is 60kph)
you'll look like everyone else flashing their hazards, and at least until the moments before impact, iisipin mo din that the vehicle in front of you is moving.
silly as it sounds, but that kind of thing can and will happen (lalo ngayon that most cars are heavily dependent on their electronic systems for even the most basic functions)
pag hirap ako sa ganyang conditions, say sa toll way, i slow down to the minimum speed and proceed as carefully as i can. dapat din natin ipreserve yung use of the fast lane at baka may dumaan na driver who really needs to speed up and pass people, even under those conditions.
that's why "hazards" should be reserved for use when your vehicle presents a hazard to other motorists (stalled in the middle of the road), and to signal / call attention to your position (baka kailangan mo lighter, wala ka pansindi ng yosi hehe
). driving in low visibility conditions requires a lot more from a driver, but that does not mean to say that you're presenting a hazard to people around you
btw, i haven't yet seen conditions here that are bad enough to preclude the use of rear fogs, although as part of my vehicle's setup, i do use 55w yellow lens driving lights (wala din ako pambili ng rear fog haha). i guess in the higher regions like sagada or baguio you can find fog thick enough to not allow you to see more than a few meters ahead, but even then you can slow down to a speed that you can reliably react to situations.
what i'd put up there is just my reasoning, even in the US, there're varying rules regarding the use of hazards. mine is simply a more practical way of looking at it. also, during trackdays, hazard lights on a car means the car is on a cool down lap before entering the pit, and is circling the track below racing speeds - even at that, the said car should stay off the racing line to avoid disrupting other drivers trying to take that line.
