EVs causing potholes ?

[Colin Bignell]

Both the coal cart and the milk cart had pneumatic tyres. I do recall seeing a lorry with solid rubber tyres though.

[Colin Bignell]

You must build roads differently in Oz. The wearing layer is only

20-40mm thick and really is there simply to make it easier to resurface the road.

You don't, unless a heavy vehicle damages it.

[Tim Streater]

What about Dobbin? Pneumatic or solid?

[Rod Speed]

What yours had is completely irrelevant.

And that was very common at the time.

[Rod Speed]

Nope.

Bullshit and it doesnt make it easier at all.

That is just plain wrong.

[The Natural Philosopher]

It is alsos to waterproof.

On better more recent roads perhaps. Not on what we have here.

Standard is MOT type 1, blinded with sand and a inch or two of gravel and tar on top

[Colin Bignell]

I was able to see the structure of my road, built in 1931, when they laid new gas mains. It has four inches of unreinforced concrete as the main road layer.

That sounds like the sort of road that gives rise to the concerns raised.

[Rod Speed]

Roads arent done like that anymore so that's irrelevant to POTHOLES

[JNugent]

Why would it be necessary to (accurately or otherwise) calculate the cost?

No-one has ever done that for any other sort of vehicle.

They've just piled on the tax and left it at that.

[Colin Bignell]

Indeed. The current specification for unreinforced concrete would require a minimum of 150mm of concrete. My road doesn't have any potholes though, despite being below current specifications.

[Clive Arthur]

<snip>

Don't think tar is used much nowadays.

[Rod Speed]

Colin Bignell [e-mail]> wrote

Irrelevant to what current potholes are caused by.

[Rod Speed]

You'd be wrong. I have watched it being used for the final work on the roads in the new estates close to my house and when current roads are retarred after decades.

[Clive Arthur]

Are you able to distinguish tar from bitumen?

Certainly here (UK), tar is only used in exceptional circumstances.

[Rod Speed]

Didnt realise you were making a distinction and I don't believe that the Turnip was doing that.

[Colin Bignell]

Warwickshire CC describe bitumen emulsion as a sticky tar-like substance

[Rod Speed]

Yeah, that's why I wasnt making a distinction.

Its often called a tar seal here, even tho strictly speaking its bitumen.

[Jeff Layman]

Many years ago it seemed to be referred to as asphalt. I can remember seeing tankers with the name "Trinidad Lake Asphalt" on the side. The company still exists, but I don't remember seeing the name for maybe 50 years. According to the Wiki on it, the UK switched to coal tar in the early 70s.

[Chris Hogg]

The following is instructive:

Basically it seems that bitumen is derived from oil distillation, tar comes from coal distillation, and asphalt is when sand, grit or gravel are mixed with either of the above.

What will they do for road surfacing when 'net-zero' comes along, if it ever does?

[Colin Bignell]

Oil is the source of the material for wind turbine blades. :-)