[Tagging] RFC: more barrier types
M∡rtin Koppenhoefer
dieterdreist at gmail.com
Tue Sep 21 01:02:12 BST 2010
2010/9/20 Dave F. <davefox at madasafish.com>:
> On 20/09/2010 19:27, M∡rtin Koppenhoefer wrote:
> Spike/Teeth Barriers
>
> http://www.entryparkingposts.com/
> These don't allow travel unless retracted.
yes, this is nice, I have never seen them, which value do you suggest?
> There's also the less destructive ones that allow travel in one direction as
> they collapse underneath a vehicle.
> (Second picture)
> A definition for a ha-ha wall would be good:
> http://en.wikipedia.org/wiki/Ha-ha
I'd say that is a combination of a retaining wall and a ditch. You
could map it as two barriers.
cheers,
Martin
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