Why do we use salt on roads? - Ed V

The Mazda thread on this site included a note from the US-based writer that their roads are not salted, so rust inhibiting was seen as less important.

Given a typical US winter, why not, and why then are ours salted quicker than a packet of Walkers when heading below 2C?

Why do we use salt on roads? - unthrottled

Driving on very cold snow/ice isn't really a problem because the ice doesn't melt as you drive over it. It is the film of water on the ice that causes the catastrophic loss of traction.

So temperatures of -20C are much less challenging than typical UK weather winters where the temperature hovers around freezing and the ice keeps melting and refreezing.

Secondly, gritting wouldn't be effective at very low temperatures. It would be counter productive. You either want all liquid or all ice, not a mixture.

Why do we use salt on roads? - jamie745

Never mind salt.

For the second day in a row, I ventured to my vehicle this morning to find it covered in Saharan f***ing sand.

Why do we use salt on roads? - mss1tw

Never mind salt.

For the second day in a row, I ventured to my vehicle this morning to find it covered in Saharan f***ing sand.

My fault. Washed, polished and waxed the van on sunday to turn up to a new job on Monday. Came out in the morning after and it looked like someone had emptied a Hoover bag all over it. >:-(

Why do we use salt on roads? - Ed V

Ditto!

Why do we use salt on roads? - Ed V

Thanks - that's concisely explains it.

Why do we use salt on roads? - Bobbin Threadbare

Thanks - that's concisely explains it.

Me too! Spent ages washing the MX-5 on Sunday...!

Why do we use salt on roads? - lambada

I'm the one who started that thread and I'm based in Malta (southern Europe) not the US. We don't get snow here.

Why do we use salt on roads? - bathtub tom

The British isles usually have mild winters. Salting the roads melts ice and snow down to around minus 5 Centigrade, below that it'll not work.

What would you rather drive on, ice or water?

Edited by bathtub tom on 01/04/2014 at 21:26

Why do we use salt on roads? - unthrottled

Ice.

Why do we use salt on roads? - the_bandit

Ice !

Why do we use salt on roads? - RichT54

What would you rather everybody around you to be driving on?

Why do we use salt on roads? - veryoldbear

I'd rather be driving on tarmac without big 'oles in it.

Why do we use salt on roads? - Trilogy

New Zealand goes for grit. Lots of old rust free cars on the road. Also, in areas more prone to ice the road surface is a coa***r grade. Unsealed roads are best. :)

Why do we use salt on roads? - madf

No sand here.

Why do we use salt on roads? - unthrottled

What would you rather everybody around you to be driving on?

Ice!

Ice rinks make use of this for public/beginner sessions. They turn the temperature down to stop the ice melting at the surface which makes it far less slippery. For the advanced users, they bring the temperature up. Big difference. Very cold snow that hazen't refrozen isn't very slippery.

Why do we use salt on roads? - Collos25

The Mazda thread on this site included a note from the US-based writer that their roads are not salted, so rust inhibiting was seen as less important.

Given a typical US winter, why not, and why then are ours salted quicker than a packet of Walkers when heading below 2C?

Certain states in the US do not use salt it never gets below freezing but others do I have seen tons of salt used in some northern states and their cars are well treated underneath with rust inhibitor.

Why do we use salt on roads? - thunderbird

Why do we use salt on the roads, its simple.

Despite most of the general public and people on this forum believing they are driving gods the truth is very different. 99.9% of the population have not got a clue what to do when its freezes or snows, witness the gridlock that occurs, especially in the overpopulated south, when 3 flakes fall or the temp drops below freezing.

Ok, salt does damage cars but fortunately they are much better protected now than they were years ago. The only part that normally suffers is the polished/laquered alloy wheels that are fitted only for bling purposes, normal alloy wheels are fine.

No salt on the roads would inevitably result in more accidents, more insurance claims and the resulting premium hike.

Wash your car regularly and salt is not an issue. Not had a corroded car since the 80's.

And don't forget the public outcry that happened a few winters ago when the weather was extremly cold and the councils ran short of salt.

As usual most people will moan for the sake of moaning.

Why do we use salt on roads? - jamie745

Had more f***ing sand on my car today.

Give up.

It can stay brown.

Why do we use salt on roads? - Snakey

Salt on the roads? Not round here, Durham county council decided the most cost efficient way is to drive the gritters around without any salt onboard but with the light flashing for that nice placebo effect!