Unknown. Records are unclear if the Fairgrounds participated in the Costa Mesa General Plan Amendment and associated environmental impact report (EIR). A traffic management plan is part of both the General Plan Amendment and EIR, and it looks like the Fairgrounds did not tell the City to expect a lot more traffic from the Fairgrounds. It is not clear how the extra traffic from the Fairgrounds will be dealt with. You could talk to the City Council about how the Fairgrounds can pay their fair share of changes to roads and streets needed to accommodate their traffic.
How Can the Agency be Required to Protect the Environment Under the California Environmental Quality Act (CEQA)?