00:00These were the conditions on the M20 when 30 vehicles collided.
00:05Videos from the scene show unusually thick fog obscuring drivers' vision.
00:11Now a driving instructor in Raynham is giving advice on how motorists can stay safe in foggy
00:18conditions.
00:19The main thing would definitely be your lighting, you know, make sure your fog will actually
00:22work and avoid using your main beams.
00:25What they'll do is they'll bounce off of water droplets and create a massive wall of
00:28glare that you won't be able to see through.
00:30So use the JIP headlights, make sure your fog lights are working before you start your
00:33journey.
00:34I'm ashamed to admit it but when I got into my car this morning I wasn't 100% sure how
00:39to turn my fog lights on but a quick internet search, I figured it out, got to turn this
00:44dial here, pull it out and as if by magic the fog light symbol appeared on my dashboard but
00:51Jack does say that you can't trust this symbol to necessarily tell you that your fog lights
00:56are working.
00:57So don't just assume that on your dashboard because it says it's working, it actually
01:01is.
01:01Make sure they're just switched on and get out and have a walk around your car and make
01:04sure it's working.
01:04The Met Office describes fog as ground level cloud which reduces visibility to less than
01:101000 metres.
01:11In dense fog this can fall below 100 and it can happen out of the blue.
01:17So fog can literally just appear from nowhere so you can literally leave home in conditions
01:23like this where it's clear and you can drive five minutes down the road and then all of
01:28a sudden bam you've literally got a wall of fog that's ahead of you.
01:32It can linger as well so a lot of people say well you know why doesn't fog burn off for
01:37example it's an expression that you hear people say you know the fog's burned off.
01:42It's purely because the sun is weak and there's no heat in it so it can hang around for a
01:48lot
01:48longer this time of the year.
01:50While we might often assume that ice or even heavy rain makes it more dangerous to drive,
01:55Jack says fog is actually the most dangerous driving condition.
01:59The most dangerous because it not only robs you of your visibility but also your stopping
02:02distance.
02:03If you're going along at a normal speed and you can't see in front of you, you never
02:07know what can be there.
02:08I tell all of my learners if you can't see, assume the worst, there could be a lorry that's
02:12on its side.
02:12If you go into it at 70 miles an hour you've got no way to stop at all.
02:16As winter descends and fog continues, Jack is urging drivers to check that their lights
02:22have the all clear.
02:24Sophie Denny for KMTV in Medway.
