[{"source_type":"rail-whistle","source_description":"BNSF Railway & Tennyson Street","source_dist_km":2.9},{"source_type":"rail-whistle","source_description":"Union Pacific Railroad & Tennyson Street","source_dist_km":2.9},{"source_type":"rail-whistle","source_description":"Union Pacific Railroad & Tennyson Street","source_dist_km":2.9},{"source_type":"rail-whistle","source_description":"RTD & Tennyson Street","source_dist_km":2.9},{"source_type":"rail-whistle","source_description":"RTD & Tennyson Street","source_dist_km":2.9}]