Re: Traffic Violation?

On Tue, 18 Jun 2024 11:00:15 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

Traffic camera on I-880 at 10:30am:
<https://cwwp2.dot.ca.gov/vm/loc/d4/tvb17i880justnorthofsr238.htm>
Play the video and click on the disappearing icon in the lower right.
Traffic is moving along, especially in the limited access (inside)
lane.  Oops.  North bound just came to a congested halt.  If anyone
wants the speed numbers, use Google Earth to estimate the distance
between the freeway lights and time how long it takes for the traffic
to move between two lights.  CalTrans recommended spacing is 25 to 50
ft.

Oops.  Using Google Earth Pro and the ruler tool, the light poles in
the camera view along the center divider are almost exactly 200 ft
apart.

1 mph = 1.47 ft/sec    t = time (seconds)
200 ft in t seconds = 200 / t / 1.47 = 136 / t mph

For a sanity check, I times how long cars took to go between the light
posts at about 3 seconds.
200 / 3 / 1.47 = 136 / 3 = 45.3 mph
Yeay, that seems about right.

To be able to go 100 mph, a car would need to travel between light
posts in 1.3 seconds.  Watch the video and imagine a car going at that
speed.  Not possible, especially in traffic.

Incidentally, Tom often complains about the poor conditions of
California roads.  Yet, with a road capable of supporting 100 mph
driving, there doesn't seem to be a problem.


--
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558