I just assume traffic outside LAX will be awful by default
Maybe more helpfully, their website posts weekly construction updates, with scheduled times of work, closures, etc -
https://www.flylax.com/en/lax-traffi...transportation. Not having flown out of LAX on United for a while I wonder if this is a generic message they send to all LAX flights (Delta has had a standing LAX "advisory" for what feels like years now).