sentences:  The highway was expanded from a two-lane highway to a four-lane divided highway from River Crossing to the Comal-Blanco county line at a cost of $30.5 million.The section of US 281 from I-2/US 83 in Pharr to George West is steadily being upgraded to an interstate-grade freeway as part of the Interstate 69 expansion, and will be signed as Interstate 69C.The section of US 281 from Loop 1604 to the Bexar–Comal county line currently experiences heavy congestion during peak hours, being the most congested highway in Bexar County.