The Cass County railroad crossing where a train hit a tractor-trailer rig stuck on the track Tuesday afternoon needed safety upgrades, a state transportation department document from last year revealed. The crash, injuring three members of a Minnesota family, occurred shortly after 4 p.m. near East 187th Street and Holmes Road. The semi was headed east on 187th when it “became high-centered and stalled” on the tracks at the crossing, according to a preliminary investigation by the Missouri Highway Patrol. A southbound train then struck the semi and trailer, the report said. MoDOT spokesperson Linda Horn said Wednesday that the crossing already has lights and gates. When asked if the transportation department had plans to address the steep grade, she said, “I‘m not aware.” Prior to the collision, a husband and wife from Minneapolis and their four children, ranging in ages from 6 to 13 years old, were traveling in the semi, said Sgt. Andy Bell, a spokesman for the highway patrol. A 1...