Surprising Coincidence, Accidental Strategy and the Value of Noticing

For the past 4 days, I've been commuting from South Jersey to New York City by car, and I've been providing my borderline OCD mind with a bit of relief by keeping track of some key travel markers, which revealed a surprisingly consistent timeline, as follows:

From South Jersey

15 minutes to the NJ Turnpike Entrance
15 minutes to exit 8
15 minutes to exit 10
15 minutes to exit 14
15 minutes to Holland Tunnel entrance
15 minutes to get through the tunnel and park

I've consistently achieved this 90 minute timetable, leaving a 15 minute buffer for traffic, but often - inexplicably and unexpectedly - making up time if/when I do run into unusual traffic. To me, this is incredible, especially since the rough 15 minute intervals are so closely coincident with the markers listed. This is also something of a lesson in accidental strategy. Without knowing any better, I decided to leave at 8:15am to bypass traffic. This just happens to deposit me at exit 10 at or slightly after 9am, thereby allowing me to occupy the HOV lane, since the HOV constraint ends at 9am. This also just happens to provide a natural offset for any traffic that I run into after exit 10, since the Holland Tunnel traffic starts to trail off after 9am, thereby expediting my travel to and through the tunnel. My only contribution to this 'happenstance' is noticing, but noticing is valuable.

So now I am wondering...

What other surprising coincidences and accidental strategies currently exist in my life? What is the value of noticing? What is the opportunity cost be of not noticing? These are good questions, I think.