LOS ANGELES (CBSLA.com) — Metro’s Blue and Expo lines could be very crowded Tuesday morning due to fallout from a mishap at the Blue Line rail yard.

The trains will consist of two cars instead of its usual three, while crews repair power system damage from a train derailment.

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Passengers have been urged to board at the front or center platforms, and to allow for extra travel time.

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Trains are scheduled to run every six minutes during rush hour, and every 12 minutes during midday.

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