Four Canyons Parkway Construction Is Reshaping North Grand JunctionTSM GJ WA Four Canyons Parkway Updates: What Locals Should Know NowRead More: What is the Longest Road in Grand Junction, Colorado? If you're commuting through north Grand Junction, Patterson Road and 24 Road are generally the best alternatives. D 1/2 Road Improvements Mean One More Route to AvoidTo the southeast, Grand Junction should expect detours around the D 1/2 Road capacity improvement project. D 1/2 Road remains closed between 29 Road and 30 Road, including the San Juan Street intersection, while crews expand roadway capacity. Overnight Highway 340 Work Could Slow Redlands TrafficGoogle Street Highway 340 in Grand Junction Will Slow You DownNighttime travelers should plan when using Highway 340 near Redlands.