I don't know if it counts as a phobia, but it's mine.
I am terrified/have horrible anxiety (to the point that it's REALLY difficult) driving to unfamiliar places. I can usually talk myself through SHORT distances..tell myself it's only 3 miles..and count it down, whatever.
Freeway..forget it. I HATE HATE HATE driving on the freeway. Those high speeds majorly freak me out anymore. I had a tire blowout on the freeway with all three kids about a year ago, ever since then I can't do the freeway without doing the countdown thing. Still, that's still tough and I avoid it if possible.
Luckily, I have in a biggish city and my entire life is within a 10 mile (city) radius, so this phobia does not effect me for general living.