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I am curious if there is a technology that allows bicycles to run over it, but will destroy car tires. From my understanding, usually poles like this are placed on trails to prevent vehicles from passing through.

Apparently, in Russia, there is a common issue with car drivers using the sidewalk. To allow the passage of bicycles and not cars, without making the pedestrians navigate between poles, maybe some kind of technology can solve the problem while keeping everyone safe.

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Explaination from comments: The russians have a real problem with drivers on the footpath / bike path / sidewalk. So there have been groups of vigilantes stopping a car on the footpath and haranguing the driver for bad behaviour. One thing they do is slap a huge hard-to-remove sticker on the car's window right in front of the driver. Literal sticker text translation would be "I spit on everyone and drive how I want"

  • A few strategically positioned poles can do a lot to discourage cars. It seems like anything that could destroy car tires would give pedestrians more trouble than poles would. – BSO rider Dec 8 '15 at 22:45
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    I don't want any kind of spike on my bicycle path. I would rather take may chances avoiding a pole (or German). – paparazzo Dec 8 '15 at 22:45
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    What is the second pic supposed to mean? – BSO rider Dec 8 '15 at 22:46
  • @BSOrider The russians / soviets / (not sure the current PC term) have a real problem with drivers on the footpath / bike path / sidewalk. So there have been groups of vigilantes stopping a car on the footpath and haranguing the driver for bad behaviour. One thing they do is slap a huge permament sticker on the car's window right in front of the driver. From memory it says "I'm a bad driver who drives illegally on the footpath" – Criggie Dec 9 '15 at 0:13
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    @BSOrider: literal sticker text traslation would be "I spit on everyone and drive how I want". – Klaster_1 Dec 9 '15 at 6:43
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Keeping cars off a bike path is easily done with bollards. Good solid posts 1-1.5m apart will completely block cars, and the middle one can be a removable, lockable version to allow service vehicle access. Alternatively a gate can be provided next to the bike gap. This also permits horse riders. Where the primary concern is horse riders but bikes are permitted, a gate that a horse can step over is sometimes fitted. A cyclist has to dismount and lift the bike over - one thing on a lightly loaded MTB, another touring with a trailer. Here a picture of one (CC-by-SA David Hawgood via Geograph.org.uk): Step-over gate In this case it would also be possible to get a bike round the gate.

Some care is needed in designing the layout of bollards and similar to ensure that recumbents and especially trikes can pass, but a straight stretch of path makes this easier.

I suggest that blocking cars isn't the hard part. Blocking motorbikes is the hard part and not one I've seen a good solution to, as off-road motorbikes aren't much bigger than bikes (narrower than trikes) and can be lifted over a step-over gate.

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    As you say, these are primarily barriers to people with luggage, load-bikes, trailers, prams, wheelchairs or any kind of mobility issues. But they don't even slow down motorbikes much, let alone stop them. So they are worse than useless. – Móż Dec 10 '15 at 20:26
  • @Mσᶎ, the gates certainly seem worse than useless. Bollards slightly less so. But none of the spike systems can differentiate between bikes and motorbikes either, which is why I highlighted that as the problem. – Chris H Dec 10 '15 at 22:23

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