![]() ![]() This technique is a common practice for construction throughout the Southwest. Controlled rock blasting is a technique used to loosen the rock along the highway, where construction requires large amounts of material to be moved to accommodate widening.The off-ramps before Sunset Point and Bumble Bee Road to get off I-17, then use those surface roads to get back onto I-17 in the same direction from which they came, so they would head back either north or south If a closure is determined to last that long, crews will guide traffic to use ![]() On nights when blasting work is scheduled, traffic will be stopped before an off-ramp, so crews have the ability to detour traffic in the opposite direction in the event of a closure that lasts more than two hours.If crews determine there will be an extended closure, the project team will make the decision to turn traffic around and detour traffic back north (north of Sunset Point) or back south (south of Bumble Bee Road) so drivers are not stopped indefinitely. The project team will make a decision at the 30 or 45-minute mark to determine if the closure is proceeding as planned, or if it will be extended to last more than two hours due to unforeseen circumstances or safety concerns.The state routes are not designed or constructed to handle interstate traffic. There are no viable detour options for a full closure of I-17.Crews will check to confirm no vehicles remain in the closure zone before the controlled rock blasting work begins.The project team is coordinating with first responders ahead of controlled rock blasting operations. Emergency vehicles will be able to get through the closure area on the shoulder, except when the blasting is occurring.In addition, workers must be able to complete the controlled rock blasting, then clear the roadway and reopen it to travelers, as quickly, safely and efficiently as possible. ![]() I-17 must be closed in both directions during blasting to keep the traveling public and work crews safe. The full closures will not begin until all traffic control is set up in compliance with the approved Traffic Control Plan and all required personnel are in their designated locations.
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