PHOENIX -- It took hours for a 10-mile backup of holiday traffic to clear on southbound Interstate 17 near Black Canyon City north of Phoenix late Monday.
The Arizona Department of Transportation said a high volume of traffic caused delays from late afternoon into the evening.
The department first reported the backup around 4 p.m. and advised the news media at about 9 p.m. that it had cleared up.
There also was slowing for two miles on I-17 southbound further north near the Junction with State Route 69.
I-17 is the main route between the Phoenix area and the higher-elevation communities of Prescott, Sedona and Flagstaff.
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