What do you call a road that does not turn? Using online translation services I get the word "straight" but it sounds wrong, maybe because I have never heard it used in this context. When driving a car behind a slow vehicle that I want to overtake I could say "I'll wait until I get to a straight"? Is that really how you would say it?
'Straightaway' is the word you're looking for, I believe.
Yes, that is all one word, and yes, it means exactly what you're talking about: a section of road (or other path) that doesn't turn.
I think that only a few people would know the meaning of straightaway. The best way is to refer to a road that does not turn as a straight road. I hope this helps you.
Update: I'm sorry if I was wrong. (May 2014)
Straightaway was the word I and my family always used as well. I'm fairly certain that everyone in my area would understand it quite easily, though maybe the term is mainly used in my region only.
I think most people will recognize what a straightaway is, even if they don't use it often.
I thought you overtake using the fast lane?
how about <Straightway>? take away the <A>
"Straightway" is not in my vocabulary. I found it in a dictionary reference though, and it seems to refer to immediate time rather than a condition of a road in most cases.
The term sounds vaguely British to me. I'll wait and see how many of our Brits protest or disown the word.
PS. My first sentence is self-falsifying, since the word entered my vocabulary at the moment I wrote it.