This map shows the SR 28 - US 2/97 intersection that is being rebuilt to accommodate a new fourth leg - the Eastmont Avenue extension. It also shows the detour utilizing Cascade Avenue which includes a temporary roundabout at US 2/97.
The red line on the this aerial photograph shows the detour route in operation for up to 40 days during construction.
This aerial photograph shows how the temporary Cascade Avenue-US 2/97 roundabout will work.