Metro trains now running at 120 kmph on Airport Line: DMRC official
Delhi Metro had increased the operational speed of its trains on the Airport Express Line from 90 kmph to 100 kmph on March 22 this year, the officials said. The speed of the trains was further increased to 110 kmph on June 22, which was in turn increased to 120 kmph on Sunday. The safety certification for the speed increase has already been received earlier this month, the DMRC said.
Source: indiatimes.com