Riyadh Metro upgradation
 

One of the largest and busiest metro station is Riyadh in Saudi Arabia.Riyadh had a population of 5.7 million in 2012, which is expected to increase to eight million by 2030.Keeping these things in mind transport authority constructing new Riyadh metro with 178km-long including six lines and 85 stations, underground, elevated and at-grade sections.