Wow! :-) I like them, just a few comments:

- we don't have "exit left" and "exit right", but "1st exit", "2nd exit" and "3rd exit"; they are used to tell what exit to take in a roundabout.
- the background has some green gradient on the right side; could you make it completely transparent instead? I can combine the icon with a gradient myself, and that will give me more flexibility in the placement/styling.
- "Straight": can you add two roads on the sides? The meaning of the icon is: there are turns/crossroads in your way, but continue to go straight.

And the last word is: thanks! :-)