How do airports distinguish between parallel runways with the same heading?

Airports distinguish between parallel runways with the same heading by designating them with specific suffixes: "L" for left and "R" for right. This system is particularly useful for runways that run parallel to each other, giving clear indications to pilots about which runway they should use for takeoff or landing. This designation helps in avoiding confusion in busy airspaces, ensuring safety and efficiency in operations.

Letters such as A, B, and C or using colors are not standard practices for identifying runways, as they can lead to ambiguity and miscommunication in aviation language. Similarly, adding numbers would not be effective for parallel runways with the same heading, as this method is typically reserved for distinguishing runways with different orientations. By using "L" and "R," there is a straightforward and universally understood method for pilots and air traffic control to communicate runway information effectively.