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How does steerable trailers know what steering angle to turn?

All the rage in Europe and England, Ireland how do these platform trailers turn on a dime also box vans are having this option.

Some I have seen on UTUBE have hydraulics/electronics to change steering on one axle, some change angles on 2-all axles!

Some manufactures use "caster" type mechanical steering. A good idea for the Northeast cities like NYC & Boston.

Saves tremendous tire ware, no scrubbing! I like the remote control features!


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So mostly its cost that stopping the usage here in the US?


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the trailers in the video you posted are state of the art and have most likely a bunch of sensors and are computer controlled and cost a lot. I have seen long pole trailers that had self steering axles connected to the fifth wheel plate by cables and that was basically a mechanical system.

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