SPEED BUMPS

We have new speed bumps in my mobile home park. I’m glad. Prior to their installation, some people who took no heed of the ten miles per hour speed limit and treated our short narrow streets like a major highway.

I see drivers on multi-lane city streets change back and forth across lanes at top speed from one stop light to the next. Sometimes they even make it through one stop light before being caught by the next one. Many times I pull up next to them, not having changed lanes or put the pedal to the metal in the 45 mph zone.

These annoyances sent me back to high school equations. Remember the problems that asked when the trains would meet?

Only on a highway with a minimum of 100 miles to travel can any significant time be gained. Even then the difference in 100 miles at 70 and 65 is a grand total of six minutes. If you are going only 10 miles the difference is all of 36 seconds. For one mile, the time difference even between 40 mph and 70 is a whopping 38.7 seconds. Wow! Think of all you can do in a whole 38.7 seconds. Just in the 7 tenths of a second you could have an accident. Not good.

Check out my math. Distance = Time X Speed     S=D÷T   T=D÷S

To go 1 mile

@ 70mph = 51.3 seconds

@ 65mph = 55.2 seconds

@ 60mph = 60 seconds (1 minute)

@ 55mph = 68.2 seconds (1 minute 8.2 seconds)

@ 50mph = 72 seconds (1 minute 12 seconds)

@ 45mph = 80 seconds (1 minute 20 seconds)

@ 40mph = 90 seconds (1 minute 30 seconds)

@ 30mph = 120 seconds (2 minutes)

@ 20mph = 180 seconds (3 minutes)

To go 10 miles

@ 70mph = 8 minutes 36 seconds

@ 65mph = 9 minutes 12 seconds

@ 60mph = 10 minutes

@ 55mph = 10 minutes 54 seconds

@ 50mph = 12 minutes

@ 45mph = 13 minutes 20 seconds

@ 40mph = 15 minutes

@ 30mph = 20 minutes

@ 20mph = 30 minutes

To go 100 miles

@ 70mph = 1hour 26 minutes

@ 65mph = 1 hour 32 minutes

@ 60mph = 1 hour 40 minutes

@ 55mph = 1 hour 49 minutes

@ 50mph = 2 hours

@ 45mph = 2 hours 13 minutes

@ 40mph = 2 hours 30 minutes

@ 30mph = 3 hours 20 minutes

@ 20mph = 5 hours

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