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RE: Design of bollards

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I'd generally agree w/ Paul's comment.  Speed bumps will USUALLY control the
speed of normal traffic, but you don't have to worry about normal traffic
colliding with your bollard and/or structure either.


-----Original Message-----
From: Paul Crocker [mailto:PaulC(--nospam--at)]
Sent: Wednesday, July 28, 1999 10:05 AM
To: seaint(--nospam--at)
Subject: Re: Design of bollards

> speed by using speed bumps.  If your bollards get out of hand, I might
> suggest something like speed bumps to limit the vehicle velocity prior
> to impact.  How fast can a person drive over speed bumps?  I'll leave
> that one to somebody else!

I once witnessed a large 70's Buick drive directly at (and over) a high
curb at about 35 mph and keep going undeterred, though the creaking noises
from the undercarriage suggested it was a really bad idea if the life of
the car is a concern (I think that the driver was trying to evade police at
the time, so the car's well-being was not an issue).  Based on that
experience, I would be a little wary of relying on speed bumps.

Paul Crocker