Hi totallyforgiven!
You are driving on the state road, there is a car wreck ahead of you, cars are passing you and crashing into the pile up making it bigger, all of the cars miss hitting you and somehow did not block you in... I hope I am guessing this right that you were able to bypass the pile up and continued moving forward? The one part that confuses me is your last sentence that you thought of this dream today and wondered how you didn't get stuck in your driveway in this dream? It's minutia, but I just want to get it right because a minor detail (highway vs. driveway) could alter the interpretation slightly.
At any rate, if you are indeed driving on a roadway and things seem to be going smoothly for your journey while others are encountering problems, I would say that something is going on in your life where you feel you are surpassing others, bypassing the obstacles you're encountering and feeling pretty good and confidant about (Like "Phew! I'm doing a good job!) it. It could also mean that it's a goal of yours and a plan in the making. Though I suspect you are excelling in something and this is your subconscious giving you a mental pat on the back for a job well done. Kudos to you!!
If on the other hand you were in the driveway, and there was a pile up which surprisingly didn't block you in your dream it changes slightly only because you aren't moving forward, but slightly delayed, but still you make it through unscathed and move forward.
No matter which scenario both reflect a good outcome, you come out on top, unscathed and moving forward while leaving everyone else in the dust.
Hope that was helpful
Angelique