Several road projects are planned along U.S. Route 89A through Oak Creek Canyon.
Officials with the Arizona Department of Transportation say the work will include a safety tune-up and structural improvements.
Heavy traffic and delays are expected for residents and travelers using the two-lane route in the steep canyon.
ADOT says the work will begin this spring and run into 2023. It includes rockfall mitigation, drainage and sediment control and rehabilitation of a bridge.
To accommodate the work, people traveling through the canyon should expect major traffic flow restriction and a limited number of full closures.