March 26, 2026
Court of Appeal of the State of California, First Appellate District, Division Two
The Rule of Bair v. California Department of Transportation is that res judicata bars relitigation of a CEQA environmental analysis's substantive adequacy when the trial court has discharged a writ of mandate directing preparation of that analysis, under circumstances where petitioners challenged the agency's compliance with the writ in multiple simultaneous proceedings but failed to appeal the writ discharge order.