Several lanes of westbound Loop 101 west of Tatum Boulevard remain closed while highway patrolmen clean up and investigate a collision that seriously injured a motorcyclist late Wednesday morning, said Arizona Department of Public Safety officers.
The motorcycle was the only vehicle involved, officers said.
Officers said the westbound on-ramp at Tatum Boulevard is closed, as well as access to state Route 51 from westbound Loop 101.
They expect the closures to last several hours..
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