The Colorado Department of Transportation and A-1 Chipseal-Rocky Mountain Pavement will start two roadwork improvement projects on Monday, Oct. 23.

The projects are expected to last through November, CDOT said in a news release.

Crews will perform crack sealing operations on:

U.S. Highway 160 in Montezuma County from the east end of Cortez to the top of Mancos Hill, five miles east of Mancos.Colorado Highway 145 in San Miguel County from Sawpit to Society Turn Roundabout west of Telluride.The primary goal of the projects consists of placing a heated crack sealant into cracks formed on several highway surface segments in southwest Colorado. The cracks are located along the edges of the travel lanes and in the travel lanes. Crack sealing is a preventative maintenance process which extends the lifespan of the pavement by preventing water from seeping into the asphalt cracks and can cause erosion.

Work will be done Monday through Friday with hours from 30 minutes after sunrise to 30 minutes before sunset. Please note traffic may be reduced to a single-lane, alternating traffic intermittently in either direction. Work segments may be up to one mile in length, with 15-minute delays possible. The speed limit will be reduced to 40 mph through the work zone. Traffic fines in the construction zone may be doubled.

Travelers are urged to follow work zone signage, use caution and consider worker safety when traveling through a work zone.