But the traffic control chicanes are similar. Basically, something in the road/track design to make the vehicle swerve back and forth, by making the road very winding, adding barriers, etc..
https://en.m.wikipedia.org/wiki/Chicane
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Traffic calming
Chicanes are a type of "horizontal deflection" used in traffic calming schemes to reduce the speed of traffic. Drivers are expected to reduce speed to negotiate the lateral displacement in the vehicle path.[4] There are several variations of traffic-calming chicanes, but they generally fall into one of two broad categories:
Single-lane working chicanes, which consist of staggered build-outs, narrowing the road so that traffic in one direction has to give way to opposing traffic
Two-way working chicanes, which use build-outs to provide deflection, but with lanes separated by road markings or a central island.
Limited accident data for chicane schemes indicate changes in injury accidents (range from −54% to +32%) and accident severity.[clarification needed][5][6]
Chicanes can also be used to prevent access to certain vehicles. The Vermont Agency of Transportation has considered adding chicanes to Route 108 in Stowe and Cambridge to prevent the passage of tractor-trailers, which often get stuck further up the road.[7]
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