A section of the road margin featuring a rough surface, rumble strips, or contrasting pavement. It provides a tactile and auditory vibration to the steering wheel, waking up inattentive drivers or warning them of an impending drop-off or hazard before they leave the roadway entirely.
Heard on the job
The new highway spec requires a milled warning track right outside the fog line.
Also heard as
- rumble strip
- sleeper line