I thought it would never be sold out after looking at the price of the ticket 
On September 23, the day of the match against Costa Rica, the KFA announced that parking in Goyang Stadium was virtually impossible
More than 40,000 spectators will visit Goyang Stadium due to the sold-out of tickets, and soccer fans who visit the stadium are strongly encouraged to use public transportation because of the heavy traffic near the stadium in the evening.”
httpswwwtopstarnewsnetnewsarticleViewhtmlidxno=14744278
