Riddle #16- I Help You Get Places -

If you want to go from point A to B,
You'll likely have to make use of me.
I have no wheels; I'm not a car,
In fact, I do not travel very far.
I'm free to use; you need not pay,
I'll be used by many in a single day.
I can decide whether or not you'll pass,
And sometimes I come with a looking glass.

What am I?