GENESEE, Colo. (CBS4) – A jackknifed semi caused some traffic troubles on Saturday afternoon.

Jackknifed semi on I-70 near the Lookout Mtn. exit. (credit: Colorado Department of Transportation)

The Colorado Department of Transportation alerted drivers about the crash just before 2 p.m.

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Jackknifed semi on I-70 near the Lookout Mtn. exit. (credit: Jefferson County Sheriff’s Office)

The Jefferson County Sheriff’s Office says eastbound lanes are closed just west of the Lookout Mountain exit.

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Jackknifed semi on I-70 near the Lookout Mtn. exit. (credit: Colorado Department of Transportation)

Drivers further west are encouraged to take US 6 to get around the crash.

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It’s not clear when the lanes will be reopened.