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Any - Lights - HGV ~ P Valentine

I saw an article by an American driver but thought I would ask the question here ?? The person in this article is suggesting in fog/heavy rain that you ONLY use your parking light. Perhaps the Americans call the dipped light their parking light ?

How many of you put your parking light on when moving, in poor visibility ?

The Highway code ( I refer to as the good book, a pun but it works for me ), states it should only be used when parked in road, or layby where the speed limit exceeds 30 mph, where there is poor visibility.

In fog or heavy rain, dipped headlights and/or fog lights need to be on. Alas you will always come across people who have no lights, even when everyone else has theirs on.

Any - Lights - skidpan

Cannot see why would want to copy the Americans, we live in a civilised world.

As far as I am aware you should only be using your dip beam headlights in reduced visibility (dark, fog, snow, heavy rain are examples) or in fog and snow you are permitted to use you fog lights.

Parking lights to me are side lights, why would anyone but a total i-d-i-o-t consider driving using those in poor visibility?

Main issue I find is the fools who think they never have to use anything but their DRL's, OK, they are bright but only at the front, at the rear its total darkness.

Any - Lights - Bromptonaut

Dipped beams are the answer in UK English/UK roads, maybe augmented with front fogs.

Main beam tends to scatter back in thick fog and are best avoided.

ISTR one occasion where I went down to sidelights and front fogs in blizzard snow on a local lane well away from street lights. The swirling flakes/reflected light rendered even dipped lights untenable.

Any - Lights - skidpan

ISTR one occasion where I went down to sidelights and front fogs in blizzard snow

That is perfectly legal. Its worked for me many times in the past but front fogs are not as powerful as the add on ones we had years ago.

Any - Lights - movilogo

Majority of cars nowadays have theirs fog lamps switched on during rain.

So rain lamps are new fog lamps.

Any - Lights - Adampr

I think the people that only have DRLs on during for and rain actually have their lights set to Auto and haven't bothered to check whether they're on.

Any - Lights - Engineer Andy

TBH I've seen many people driving around at night with just their DRLs on only, probably because they're driving on well-lit streets with (white light) LED streetlights. So many appear to have no idea that they don't have their dipped on - maybe a previous car had auto lights and the current one doesn't?

Any - Lights - Terry W

In well lit urban areas dipped headlights seem to add little or nothing to visibility.

The only evidence of their existence is when queueing behind another car at traffic lights etc that they illuminate the car in front from a distance of ~1m.

If DRLs are adequate to warn others (pedestrians and drivers) there is no issue if dipped headlights are not on.

Any - Lights - RT

In well lit urban areas dipped headlights seem to add little or nothing to visibility.

The only evidence of their existence is when queueing behind another car at traffic lights etc that they illuminate the car in front from a distance of ~1m.

If DRLs are adequate to warn others (pedestrians and drivers) there is no issue if dipped headlights are not on.

The issue is that when DRLs are on, there are no lights visible from the rear - too many drivers seem to drive around like this.

Any - Lights - skidpan

In well lit urban areas dipped headlights seem to add little or nothing to visibility.

The only evidence of their existence is when queueing behind another car at traffic lights etc that they illuminate the car in front from a distance of ~1m.

If DRLs are adequate to warn others (pedestrians and drivers) there is no issue if dipped headlights are not on.

The issue is that when DRLs are on, there are no lights visible from the rear - too many drivers seem to drive around like this.

That is exactly what I said in an earlier post. It clear that the person who wrote the first part of this post is unaware of this.

Surely the clue is in the name, DRL = Daylight Running Lights.

The intelligence out there is very limited it seems.

Any - Lights - gordonbennet

The intelligence out there is very limited it seems.

If anyone wonders why the traffic is low on this forum there's a clue.

In truck world some makes automatically illuminate all the rest of the lights with DRLs some don't, maybe the poster knows of some other vehicles where this is the case.

Any - Lights - Manatee

In well lit urban areas dipped headlights seem to add little or nothing to visibility.

The only evidence of their existence is when queueing behind another car at traffic lights etc that they illuminate the car in front from a distance of ~1m.

If DRLs are adequate to warn others (pedestrians and drivers) there is no issue if dipped headlights are not on.

It's not your own visibility that's the issue, it's others' visibility of your car.

Just put the dipped headlamps on and have done with it.

If you don't have any lights on at all, you may well have DRLs on at the front but probably none at the rear.

If you put only the position (side) lights on then the DRLs will either dim or extinguish.

Our 2014 Roomster has no DRLs anyway. The 2017 MX-5 has DRLs but they go out when the side lights are on on when the parking brake is on! The rear lights on this car do actually come on with DRLs. The 2016 Outlander has DRLs but they dim when the side lights are on. It has no rear lights when on DRLs only.

Additionally, many DRLs in daytime mode are far too bright for use at night, and unlike dipped headlamps are not directional and have no cut-off. DRLs alone are a very bad idea in poor visibility.

Any - Lights - mcb100
The other issue with just using DRL’s in the dark is that they’re just designed to emit light in all directions, not with a cut off like with dipped headlights.
More of a dazzle from a 21W (equivalent) DRL than a 55W (equivalent) dipped headlight.
Any - Lights - davecooper

I started a thread about DRL's some time ago asking why these are not law on the rear of vehicles as well. I still don't understand why.

Any - Lights - Smileyman

Very good question, should be standard.

On my SEAT TOLEDO the rear lights are lit alongside the front lights, these are LED lamps. Also, the dashboard goes dark in times of darkness (or entering a tunnel) and only illuminates when the headlights are selected. Again, a sensible thing.

Any - Lights - FoxyJukebox
If fog is seriously thick then the advice must surely be “don’t drive”
Any - Lights - movilogo

The DRL idea originated from Scandinavian countries where winter is mostly dark and pedestrian often had difficulty spotting approaching cars. Then EU adopted it and because same standard was applied all over EU, we inherited it.

Now it has become universal and I don't think they offer much value in tropical countries in Asia etc.

If fog is seriously thick

Fog can appear suddenly while on journey and sometimes it may be dangerous to stop as well (e.g. in middle of motorway).

Any - Lights - Engineer Andy

Unless the light level is low - twilight or very overcast - I personally don';t see why dipped headlights are needed - given in my view it's 'to be seen' rather than to see, which I think you should be able to do wither with no lights at all or just 'sidelights'.

Even though the law is for the use of dipped rather than sidelights on such conditions, rarely have I seen people pulled over by Plod for using the latter instead.

What is getting far more common is people not having ANY lights on at all or just DRLs when driving at night in areas lit by (white) LED streetlights. Odd really, given that I would've expected many of the cars I see do this have auto lights, given how recent they appear to be. Maybe it is still a feature only on upper spec models?

Whatever the cause, more drivers appear to be oblivious to driving without lights in urban areas.

As regards driving in fog and use of lights, my car has front fog lamps, and whilst they are useful in thicker fog, they really are there to find the edges of the road up to about 10-20m away, and thus won't allow the driver to drive much more than 20mph. At higher speeds, they aren't much use.

I've also driven when it's been raining so hard that visibility has been akin to quite heavy fog, good enough for 20-30mph at best, and yet many continue to drive at ridiculously high speeds with no way of being able to stop in time due to the reduced visibility and poor road conditions. I think that way too many people think their car's 'safety' gizmos will come to their aid, when all they'll do at best is mitigate a fatal crash to one with very serious injury (at best).

To be honest, the only people who should be driving in thick fog are those doing so for their job and for crucial infrastructure needs and emergency services, plus perhaps farmers in the own emergency situation. Not worth the risk otherwise, especially if it causes accidents that stretch the emergency services resources even thinner.

Any - Lights - Andrew-T

<< Fog can appear suddenly while on journey and sometimes it may be dangerous to stop as well. >>

It can, or thick smoke can blow across a M'way. But our fogs are nothing like they used to be, fortunately.

Any - Lights - Engineer Andy

<< Fog can appear suddenly while on journey and sometimes it may be dangerous to stop as well. >>

It can, or thick smoke can blow across a M'way. But our fogs are nothing like they used to be, fortunately.

Remember that big fire near the M5 that essentially caused a huge pile up through a very similar effect to dense fog?

Any - Lights - FoxyJukebox
Indeed-and I can remember a massive multi prang in fog on the A12-early sept a few years ago where the road is near the river ….
Everyone involved in shorts with “disgusted of Ipswich” faces
Any - Lights - Engineer Andy
Indeed-and I can remember a massive multi prang in fog on the A12-early sept a few years ago where the road is near the river …. Everyone involved in shorts with “disgusted of Ipswich” faces

((chuckle)) Rather like us today after the Leeds game... ;-)