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Stack interchanges and water barrels

Started by Djeserkheperure, September 21, 2008, 08:29:16 PM

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Djeserkheperure

Greetings,
can anyone tell the meaning of those huge water barrels that you can see in some North American movies. They can be seen near stack interchanges, where vehicles are given opportunity to leave the freeways. Are they just shock absorbers protecting those expensive bridge structures by reducing collision speeds?
Djes

PatrickN

They are used like cones.  They have a little bit of water in them so they don't blow away in the wind.  Their large size makes them more visible than regular cones and they are normally used around road construction.  I've never seen them left in place for very long after the construction is done, and when the work is only taking a day or two, they usually use regular cones.

Painter, in and out of retirement.

Ashley

I always assumed they were used as shock absorbers, to prevent a vehicle from having a head-on collision with a sharp concrete wall, certainly I remember seeing them used as such in a couple of movies...
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PatrickN

#4
I've never seen them used that way, but I've never been to California.  I always assumed they are a Hollywood myth, like pulling the hammer back on a 1911 pistol is the same as pulling a hammer back on a single action revolver, or that Will Smith is good in movies that aren't comedies.

I will try to pay attention as I run my 200 mile circuit tomorrow and see if I see any traffic drums placed like they are on the movies.

Painter, in and out of retirement.

afransen

They are meant to absorb energy from collisions, making decelerations more gradual. Generally, avoiding making road butter of car passengers in crashes.