Hanoi, Aug. 30 -- The two metro lines in Hanoi will operate continuously from 00:00 on September 1 to 3:10am on September 2 to meet travel demand expected to surge as people flock to Hanoi streets to witness the official National Day parade on September 2 morning. After that, trains of the Cat Linh - Ha Dong and Nhon - Hanoi Station routes will continue running from 4:30am on September 2, Director of the Hanoi Transport Management and Operation Centre Thai Ho Phuong said on August 30. They will operate with a six-minute interval during 4:30-7:30 am and 11 am -2:30 pm, and a 10-minute interval during other times. Services will pause between 3:10 am and 4:30 am for technical checks. Mobile ticket counters will be added on the first and seco...