8月15日至17日，北京天安门地区及相关道路分时、分段采取临时交通管理措施

Group 1 - The announcement details temporary traffic management measures in Tiananmen area and related roads to ensure safety during a special event [2][6] - Specific timeframes for traffic restrictions include August 15, 22:00 until the event ends, and various segments on August 16 and 17 [2][3][5] - Certain roads will be completely closed to vehicles and pedestrians without special event permits, while alternative routes are provided for social vehicles [2][4][6] Group 2 - The traffic restrictions will affect major roads including Chang'an Avenue, East Second Ring Road, and various streets around the Forbidden City and Tiananmen Square [3][4][5] - Residents and permit holders will have designated routes for access during the traffic control periods [3][4][5] - The public is advised to plan their travel in advance and comply with the traffic management measures [6]