This sign is usually found by chevron markers and encourages drivers to checking how far away they are from the vehicle in front.
Category: Motorway signs Shape: Rectangular Background Colour: Blue Foreground Colour: White 
This sign is usually found by chevron markers and encourages drivers to checking how far away they are from the vehicle in front.
Category: Motorway signs Shape: Rectangular Background Colour: Blue Foreground Colour: White