Operation Lifesaver is the nation's most influential rail-safety group, preaching its gospel of driver responsibility to judges, police officers, elected officials and the news media...But documents show that the organization is tightly bound to the railroad industry, and critics, including many accident victims, say the group's message serves another agenda: to inoculate the railroads against liability in grade-crossing collisions. [refers to Union Pacific, Southern Pacific (now part of Union Pacific), Amtrak]