It’s a common enough idea. If you need to be somewhere by a specific time, and being late isn’t an option, you throw in more time than you should need so that if something goes wrong you can deal with it. All well and good (in an ‘accepting your own inevitable failure’ type way) so far.
What happens though when you don’t fail? When things go right and your journey takes exactly as long as the internet told you it would?
I had an interview today (aren’t they wonderful things?) and being the sensible chap that I am (and not wanting to be half an hour late like I was to the last one – another story), I set out half an hour earlier than the time the journey needed. Being the middle of the day in a rather unexciting area of non-city, my route was clear, and I arrived exactly when predicted. Only now I was half an hour early.
In my book, that falls into the too-early-to-arrive-without-seeming-the-other-sort-of-disorganised category. You can’t walk into an office and expect to be catered for at that time. You may as well arrive three hours early and make yourself at home. So there I was, with too much time to wait at their office, and too little time to do anything else.
What people need to think about when planning a journey is having a contingency plan for their excess contingency time.