Construction for a maglev train line that would take passengers from Washington to Baltimore in 15 minutes could alter a D.C. neighborhood and affect nearby properties for years, District officials said Monday. A maglev station in the Mount Vernon Square area has the potential to change the character of the neighborhood and bring “substantial construction and long-term operational implications on nearby properties,” Andrew Trueblood, director of the D.C. Office of Planning, said in a statement that urged residents and city leaders to engage in the federal review of the multibillion-dollar project. The 40-mile “superconducting magnetic levitation train system,” commonly called...