loose railroad spike lifts from metal rail footing

angle antiquated clamp clip cold commuter creosote crosstie danger dangerous dot expansion exploration explore fashioned fasteners freight gauge heat heated horizontal immobile immobility infrastructure inspected inspection joints lackawanna line linear locomotive maintenance mass metallurgical metallurgy modern molybdenum nail narrow neglect neglectful old pad passenger pattern polka practice railroad railroadiana repair retro right rough secure secured security smooth spike standard steel straight tie train transit transportation travel trax treated vertical welded welding wood worsening