Maybe the picture doesn't reflect the actual road very well but it looks like flat, almost straight and lots of room to pass to me. 

I suppose the "no passing zone" is there for a reason but it isn't a very obvious one. Might not be legal but I fail to see lives being risked. 

I tend to be a cautious driver, but I'll be honest. I envy you being able to road equipment with no hills, curves, narrow lanes, mailboxes and traffic. 

Have a good day.