The Indiana Department of Transportation plans to chip seal U.S. Highway 421 this Wednesday and Thursday (JULY 19 & 20), weather permitting, between Madison and the Jefferson-Ripley county line.
Maintenance crews from INDOT’s Madison Subdistrict will place surface treatment materials on the northbound U.S. 421 lane beginning at Madison Wednesday morning. Thursday, the operation will focus on the southbound lane starting at the county line. In all, 16 lane miles will be chip sealed.
INDOT officials advise motorists to drive very slowly and with extreme caution to avoid damage from asphalt spray and loose aggregate.
Chip seal applications coat highways with liquid asphalt that seal pavement cracks and protect the roadbed from harmful ultraviolet rays. Small chips of limestone are used to cover the fresh asphalt—“choking” its fluidity and adhesion to minimize spray from traffic and stickiness to tires. Aggregate chips also restore surface friction for better maneuverability and improved stopping capabilities.
The surface treatment is a cost-effective pavement preservation measure that extends service life of functional highways. Every $1 spent on chip sealing roadways saves the state and its taxpayers $6 to $14 in subsequent expenditures.