Chip-sealing repairs pavement damage and extends the life of the roadway. The treatment also improves safety for motorists by providing a smoother, skid-resistant driving surface. Centerline rumble strips are grooves or rows of raised pavement markers placed perpendicular to the direction of travel. As a vehicle passes over the rumble strips, noise and vibration are produced alerting inattentive drivers when they are crossing over into on-coming traffic. For more information on the chip-seal process, visit www.wsdot.wa.gov/regions/eastern/chipseal. You can also visit http://www.wsdot.wa.gov/Design/Policy/RumbleStrips.htm to learn about rumble strips.