A person never leaves the house without this license so it is natural that it will be stuck in the mind because people are always thinking about it, specifically when it comes to dreams.
If you have a dream about a driver license it means that you have a lot left to do in life but you also have the resolve to accomplish all of this. If you have a dream in which you are the picture on a driver license or in which you see yourself on a driver license it means that you have accomplished a lot and thanks to all of the trials you have gone through in life you are now being rewarded for all of your hard work. This is a great dream to have and it should help reaffirm a lot of the issues that you were feeling within yourself. Hopefully thanks to thins dream you will now see just how important it is to have a good time in life but also to get things done and make sure that you are responsible about it.
If you are having a dream in which you are giving someone a drivers license or you are administrating a test that someone else is taking to get their driver license then it means that you feel extremely confident in your own skills and you feel like you have done a lot in life to deserve to be recognized for that. This dream is not a meaningless one, it is one which should help affirm to you the fact that you are now a more confident and capable person in whatever profession or vocation you chose for yourself and you should be able to get a lot more work done because of it.
If you have a dream in which someone asks you for your driving license it means that you are questioning how well you have performed at something which you thought you were good at recently. Dreaming is usually an activity which people feel pretty confident about because it is something that they grow used to doing so often that they stop thinking of it as a challenge and stop remembering just how difficult it might be for some people. If you have a dream in which you are being asked for your driving license by a police officer it means that you have made a mistake at something you were confident in and now you are starting to question your own skill at that very thing. This is not good or healthy and hopefully you will be able to get over it. This is the best thing for you.