Runway hold position markings are visual indicators located on taxiways near runways. They consist of two solid yellow lines and two dashed yellow lines. The solid lines indicate where an aircraft must stop, while the dashed lines show the boundary for entering the runway. These markings help maintain safety by preventing unauthorized runway incursions. Pilots must ensure their aircraft is behind the solid lines until they receive clearance from air traffic control to proceed onto the runway. Proper adherence to these markings is crucial for safe airport operations.