Difference between into and in to

The word onto has to do with surfaces. Go ahead and look it up. So, if onto has to do with surfaces--a road for instance--then the onus is on you to provide an unambiguous source for your claim that into is grammatically correct when referring to a car turning onto a road. Why don't you do that?

I "don't see that" because its'not true. You made a claim, therefore you have the burden of proof. I am under no obligation to disprove your claim.

Babble on, Glennnnnnnnnnnnnnnnnnnn, babble on.

"He turned onto the road."

The word onto relates to surfaces. I have provided definitions to prove that. You have shown nothing to the contrary. The road is a surface. Therefore, onto pertains to the road, and is therefore the correct word. If you believe that the word into actually means onto--which is contrary to the established definition of both words--then you are obligated to cite something besides your opinion to show that this is the case. You have failed to do so. Providing random, anonymous dialogue between internet posters from obscure forums is not an authoritative source, and you know that.

Glenn, do you have some kind of neuro condition, like Aspergers?

Not to pile on you, but I should probably show you this:

turn onto

turn onto something:

1. Lit. to walk or steer one's vehicle onto a road, highway, or path. Turn onto the main road and go west about a mile. As she turned onto the familiar highway, she realized that she had left her purse in the store.
2. turn onto someone or something; to become interested in someone or something. Jeff turned onto electronics at the age of fourteen. I tried to get her to turn onto me, but she could only think of John.

http://idioms.thefreedictionary.com/turn+onto
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turn into
v.
1. To direct one's way or course into something: The truck turned into the gas station.
2. To cause someone or something to take on some character, nature, identity, or appearance; change or transform someone or something into someone or something: The designer turned a rundown house into a show place. We turned the spare room into a nursery.
3. To change into something or someone; become transformed into something or someone: The night turned into day. In the story, straw turns into gold.
4. To convert something into something: The singers turned their talent into extra money.
5. To pour, let fall, or otherwise release something into some receptacle: The chef turned the soup into the dish.

http://idioms.thefreedictionary.com/turn+into
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That should clear up any misunderstandings about the meanings of into and onto, especially when it comes to roads.

Testy, do you have some kind of neuro condition that causes you to believe that you've just presented an argument?

I don't have to tell you that insults always come from the losing end, do I?

You're just angry. You'll get over it . . . or not.

I wasn't hurling any abuse at you, it's just your attitude and method of "argument" seems not exactly neurotypical.

No one believes that. You just don't like being wrong, and so you've resorted to insults.

If you can show me to be incorrect in my argument, please do that. Of course, we both know that if you could, you would.

Is there anything else you need to get off your chest?