The project generally consists of the westerly extension of Herrin Road approximately 1.66-miles from its current terminus at the Cambria Road roundabout through an agricultural setting and across a tributary to the Big Muddy River and its associated floodplain to just east of the Jackson County line at the roundabout associated with the Walker’s Bluff Casino Resort. The overall extension was evaluated as part of the 2016 Southern Illinois Metropolitan Planning Organization’s (SIMPO) East-West Corridor Study, which ultimately recommended that Herrin Road be extended to Reed Station Road for a total length of about 3.25 miles.