Construction and Types
The rumble strip formats are:
- Rolled-in, applied to newly laid warm moldable asphalt pavement.
- Milled-in, applied to existing hardened asphalt or concrete roads.
- Formed, a corrugated form is pressed into fresh concrete.
- Raised plastic or ceramic units, fastened to asphalt or concrete pavement and often with a reflector built into the edge. Botts' dots are a common installation.
- Raised thermal plastic strips that are melted and fused to the pavement.
- "Smart car" virtual shoulder rumble strips, referred to as a lane departure warning system, available on luxury vehicles and commercial trucks. The alarm is similar to the sound produced when striking rumble strips.
- "Smart car" virtual transverse rumble strips to prevent cross-path crashes at intersections are being developed.
Surface-mount raised pavement reflectors are easily removed by the blade on snowplows and thus are not practical in many locations in the United States and Canada.
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