The Truth About Black Ice. And How to Spot It

Black ice is one of the biggest winter hazards, and the worst part is… you often don’t know it’s there until it’s too late.

Despite the name, black ice isn’t black. It’s actually clear – a thin layer of frozen water that blends perfectly with the surface beneath it. That’s why it’s so dangerous: people simply don’t see it coming.

What Causes Black Ice?

Black ice forms when:

• The ground is already cold

• There’s light moisture in the air

• Temperatures dip close to freezing

  
  

It often develops overnight or in the early morning, before traffic or sunlight can disrupt it.

Where You’re Most Likely to Find It

You’ll usually see black ice (or not see it…) in places like:

• Shaded roads and footpaths

• Bridges and flyovers

• Quiet industrial estates

• Car parks with poor drainage

• Rural roads with little traffic

  
  

Anywhere that stays cold and undisturbed is a prime spot.

How to Spot the Signs

Because you can’t rely on seeing it, look for:

• Pavements or roads that appear slightly “wet” despite freezing temperatures

• A slight shine or gloss on the surface

• Frost on grass or cars but no frost on the road – that’s a giveaway

• Temperatures hovering between -1°C and +2°C

If conditions feel right for black ice, assume it’s there.

Why It Matters

Even a thin layer can cause slips, falls, skids and serious disruption, especially in business areas where early traffic is light and surfaces stay untouched.

Want to reduce the risk of black ice at your business or property?

Learn more about proactive gritting and snow clearance at https://www.wintergritter.co.uk/.