Flashing headlights – Highway Code Rule 110
Flashing headlights. Only flash your headlights to let other road users know that you are there. Do not flash your headlights to convey any other message or intimidate other road users.
white diagonal stripes or chevrons – highway code rule 130
The Highway Code applies to England, Scotland and Wales and is essential reading for everyone.
Areas of white diagonal stripes or chevrons painted on the road. These are to separate traffic lanes or to protect traffic turning right.
If the area is bordered by a broken white line, you should not enter the area unless it is necessary and you can see that it is safe to do so.
If the area is marked with chevrons and bordered by solid white lines you MUST NOT enter it except in an emergency.
Laws MT(E&W)R regs 5, 9, 10 & 16, MT(S)R regs 4, 8, 9 & 14, RTA sect 36 & TSRGD 10(1)
The Official Highway Code: reflective road studs -Rule 132
The Highway Code applies to England, Scotland and Wales and is essential reading for everyone.
Reflective road studs may be used with white lines.
White studs mark the lanes or the middle of the road.
Red studs mark the left edge of the road.
Amber studs mark the central reservation of a dual carriageway or motorway.
Green studs mark the edge of the main carriageway at lay-bys and slip roads.
Green/yellow studs indicate temporary adjustments to lane layouts, e.g. where road works are taking place.
http://content.govdelivery.com/accounts/UKDSA/bulletins/9ec360?reqfrom=share
Windy weather – Highway code Rule 233
In very windy weather your vehicle may be affected by turbulence created by large vehicles. Motorcyclists are particularly affected, so keep well back from them when they are overtaking a high-sided vehicle.
The Highway Code applies to England, Scotland and Wales and is essential reading for everyone.
Brakes affected by water – Highway code rule 121
If you have driven through deep water your brakes may be less effective. Test them at the first safe opportunity by pushing gently on the brake pedal to make sure that they work. If they are not fully effective, gently apply light pressure while driving slowly. This will help to dry them out.
Find out more about driving and dealing with floods on the Safe Driving for Life website.