Helipad taxiway is designated and adjusted to helicopter operations only. Such taxiways are lit with two-direction green flashing lights. They are placed in equal intervals, every 60 meters tops. They mark the borders of a taxiway. When it comes to obstruction lights, it is used when an object may collide with an aircraft operation path and cause a threat. These can be tall buildings or towers.
Obstruction lighting consists of lights of different intensity. A low-intensity light is used when an obstruction is not higher than 45 meters. A medium-intensity light is used for massive objects or facilities higher than 45 meters. When it comes to high-intensity lights, it can be used instead of painted marking. Therefore, it is usually used to mark buildings that are impossible to paint on, such as skyscrapers.