here in my location its not a mental disorder......yet.... for things like not paying attention and end up walking out in traffic. other locations outside the USA call this Maladaptive Daydreaming Disorder. to find out what this is in your own location you would have to contact your own medical and mental health doctors who can administer medical and mental health testing to diagnose what the problem is and why you do it and what treatments will best work for you.

here in my location what works is called thought stopping... in short it means when finding yourself daydreaming or deep in thoughts at the wrong times to stop what you are doing, recognize your behavior and choosing a more appropriate time to do that activity when it wont interfere with what you are doing at this moment.

here in the USA there are also a couple therapy approaches that focuses on changing ones thoughts and behaviors called Cognative Behavioral Therapy (CBT)and Diabolical Behavioral Therapy (DBT) both of these will teach you how to control your daydreaming and sinking so deep into your thoughts that you end up a danger to your self or others.