Saudi Arabia's aviation regulator has unveiled plans to expand the Riyadh airport three-fold in size within the next five years, as passenger traffic rises rapidly, Reuters has reported. The Riyadh airport is one of 27 in the kingdom. Saudi Arabia's airport traffic has reached 50 million passengers annually and is expected to exceed 80 million within the next 10 years, said Ali al-Zahrani, director general for corporate planning at the General Authority for Civil Aviation. "We developed a comprehensive master plan with a conceptual design for the four terminals that will raise the capacity at Riyadh airport from 12 million to 24 million," he said.