Residents near the venue for the June 28-29 Group of 20 leaders' summit will face traffic restrictions immediately before and after the meeting, Osaka officials said Wednesday evening, but the exact measures are still being worked out.

About 200 residents of the city's Suminoe Ward, near the waterfront, gathered to hear the first of four presentations by officials this month on the local impact of the first-ever G20 summit in Japan. The event is expected to bring about 30,000 people to the city, including over 20 world leaders, the heads of various international organizations, and up to 3,000 members of the media.

The venue for the summit, Intex Osaka, is an aging complex by the city's waterfront district. There are two subway lines that lead from the center of the city to the area, as well as the Hanshin Expressway.