Transverse rumble strips are used to alert drivers of a need to slow down or stop, or to other upcoming changes that may not be anticipated by an inattentive driver. These rumble strips are placed in the travel lane perpendicular to the direction of travel.

Transverse rumble strips (also referred to as bar markings) are placed across the traffic lane to alert motorists to hazards ahead (such as bends, intersections or areas of pedestrian activity). They are most effective where drivers have been travelling at sustained high speed for long periods.

Transverse rumble strips are grooves cut into the pavement that act as a warning device. When driven over, the strips create noticeable sound and vibrations to warn drivers of an approaching intersection where they must slow down or stop.