You probably don’t really space out, your brain just doesn’t bother
to remember it, so once the journey is complete you have little or no recollection of paying attention during the drive.
This happens a lot when it’s a familiar route. The first time your brain is on full alert trying to remember the route as much as possible – it’s all new. Once you’ve made the drive enough times there’s little value to you to remember any mundane specifics so none of it makes it into your memory unless something out of the ordinary happens.
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