§ 212.409. Travel lane rumble strips.

 Temporary bituminous rumble strips may be used in the travel lanes to provide an audible warning to alert drivers of a potentially dangerous situation including a median crossover, lane reduction and congested area. Recommended rumble strip designs are available from the Bureau of Highway Safety and Traffic Engineering. When used, the rumble strip patterns must extend onto the shoulder whenever possible to discourage drivers from making erratic maneuvers in an attempt to bypass or avoid the rumble patterns.

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