Another lane has been closed now for emergency repairs to Interstate 70 over the Blanchette Bridge. Two lanes closed Friday after an expansion joint broke and damaged the lanes. A third lane is now closed as a repair team fixes that joint. It's part of a large steel plate system that runs the length of the bridge. Investigators suspect the joint may have expanded and risen slightly above pavement level. A large truck may have hit it and flipped it up into the roadway causing problems for drivers.