A kind of system

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A kind of system

Post by Stevenloan » Wed Sep 13, 2017 4:18 pm

Hi everybody! What do you call this system? In action films, when a car tries to escape, this system is turned on to stop the car.

http://congtudong.net/lap-dat-cot-chan- ... t-nam.html

Thanks very much!

StevenLoan
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Re: A kind of system

Post by Erik_Kowal » Thu Sep 14, 2017 12:09 pm

Those objects are known in Britain as rising bollards, retractable bollards or automatic bollards. They are generally used to allow buses or other authorized vehicles to pass over them while blocking most other traffic. Some installations are designed to detect such vehicles and retract automatically as they approach the bollard(s).

(For more detailed information, see for instance https://en.wikipedia.org/wiki/Bollard#R ... e_bollards)
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Re: A kind of system

Post by Stevenloan » Sat Sep 16, 2017 4:58 pm

Erik: Thanks a lot for your help. I really appreciate it.
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