The intersection of State Route 88 (Apache Trail) and Superstition Boulevard in Apache Junction will close for 30 days starting Monday, July 9, as the Arizona Department of Transportation constructs a modern roundabout that will enhance safety and increase traffic capacity.
Detour signs will direct drivers around the closure. Alternate routes west of SR 88 and Superstition Boulevard include going north-south on Idaho Road and east-west on Lost Dutchman Boulevard. East of the intersection, Tomahawk Road can take drivers between US 60 and SR 88.
An alternative to a traditional intersection using a traffic signal, the modern roundabout scheduled for completion late this summer is designed to accommodate large vehicles and vehicles pulling trailers. The inner circle, known as a truck apron, has additional pavement at the edge that allows larger vehicles to easily maneuver within the roundabout.
Modern roundabouts, which operate without traffic signals, provide a number of safety benefits. They feature just eight conflict points for traffic, versus 32 in a traditional intersection. According to the Insurance Institute for Highway Safety, modern roundabouts provide a 90 percent reduction in fatal crashes, a 75 percent reduction in injury crashes and reductions in crashes involving pedestrians and bicyclists.
By eliminating wait times at traffic signals, roundabouts enhance traffic flow and capacity while also reducing fuel consumption and pollution.
The $3.3 million project, which began in March, also includes realigning SR 88 at the interchange, installing lighting, reconstructing turnouts and rerouting Goldfield Wash around the relocated roadway.