Dubai's Roads and Transport Authority (RTA) has said the launch of the second line of the Dubai Metro - the Green Line, has been delayed from August to the last quarter of this year, Gulf News has reported. "The Green Line will be operational at the end of the last quarter of 2011. It is under construction now," Mattar Al Tayer, chairman and executive director of RTA, told the daily. Once completed, the Green Line is to run through heavily populated areas such as Bur Dubai and Deira and is scheduled to have 18 stations along an approximately 23km stretch, with six underground stops.