Complex sentence: Just before the roadway enters downtown St. Louis, I-70 turns to the east to cross the new Stan Musial Veterans Memorial Bridge, which redirects I-70 traffic away from the congested Poplar Street Bridge to the south.
Split into simpler sentences: Just before the roadway enters downtown St. Louis, I-70 turns to the east to cross the new Stan Musial Veterans Memorial Bridge. The new bridge redirects I-70 traffic away from the congested Poplar Street Bridge to the south.