SEATTLE (AP) -- A venture capitalist who wants to build a sports arena to bring professional basketball back to Seattle will pay for a study to determine the impacts on traffic and parking following objections by his potential neighbor - the Seattle Mariners.

King County Executive Dow Constantine and Seattle Mayor Mike McGinn announced the study at a Thursday news conference. Chris Hansen's pledge comes after the Mariners baseball team said they worried about traffic problems in the SoDo neighbhorhood if a third sports arena was built there. The area is already home to the Mariners' Safeco Field and CenturyLink Field, where the Seattle Seahawks and Seattle Sounders play.

Hansen has offered a plan calling for up to $290 million in private investment and capping the public investment at $200 million.