Roadwork has started on a highway south of Sedan. According to the Kansas Department of Transportation, mill and overlay work is underway on K-99 in Chautauqua County. The 6-mile project begins at the Oklahoma-Kansas border and continues north to U.S. 166. Flaggers and a pilot car operation are guiding one-lane traffic through the work zone during daylight hours. Drivers can expect delays of 15 minutes or less. The road work should be completed by the end of June, weather permitting. KDOT awarded the construction contract of $1 million to Bettis Asphalt & Construction Inc. of Topeka.