Two accidents on the busy Highway 880 corridor early Tuesday left the major traffic artery backed up for miles, authorities said.

According to the California Highway Patrol, the first crash involved a garbage truck on northbound 880 near the Oak Street exit in Oakland around 6 a.m.

There were no injuries in the crash, but it forced the shutdown of three lanes of traffic for about 30 minutes. The crash backed up traffic all the way to the Coliseum and was cleared around 6:30 a.m.

Just as traffic began to move freely again in Oakland, a motorcyclist was injured in a crash on southbound 880 north of the Stevenson exit in Fremont at around 6:20 a.m.

The crash backed up traffic all the way into San Leandro. All southbound lanes were reopened by 7 a.m. but the commute was expected to remain slow on 880 throughout the morning commute.