SAN LEANDRO (BCN/CBS SF) — Two crashes on southbound I-880 in Oakland and San Leandro are snarling traffic in the East Bay Thursday afternoon, according to CHP.

Big-rig trucks are being allowed to use eastbound Interstate Highway 580 in Oakland due to an earlier wreck that’s clogging traffic along the Interstate Highway 880 transition to Interstate Highway 238.

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The non-injury crash involving a box truck was reported shortly after 9 a.m. on the southbound I-880 connector ramp to southbound I-238, CHP said.

The right lane was closed and a Sig-Alert issued by the California Highway Patrol.

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The box truck hit a guard rail. CHP estimates the wreck won’t be cleared until 8 p.m.

Additionally, there was a second accident shortly before 12:30 p.m. involving a semi truck on southbound I-880 past 98th Avenue with an oil spill that is blocking the three right lanes.

Just over two hours later, CHP reported that the crash had been cleared and all lanes were reopened.

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Motorists are advised to expect delays and to use alternate routes to avoid the continuing impact of the incident on the southbound I-880 connector to southbound I-238..