if you are trying to get to DOWNTOWN LA you wont get there on the 405 becaauseit doest go to DOWNTOWN it Bypass downtown thats why its call the 405 (the 4 means it by passesthe downtown slotyou would have to take the 5 go into downtown LAbut now if you were going to West Los Angeles then yes you can could takee 405
405? Bzzzzzt! Wrong answer, thanks for playing, here s Johnny to tell you about your parting gifts.Know why they call it the 405? Because you go 4 o 5 miles per hour!Where in LA do you need to go? I-5 is generally faster. You have MANY chokepoints on the 405. At 7AM, both 4 and 405 will be crowded. Best time? 5AM at the latest, or after 10:30. Ever thought of taking Metrolink? MUCH easier. You go straight from Irvine to Union Station, and you can catch the Red Line Subway if you need to go downtown (free with metrolink ticket).
Wow, this will be an all-day task. Leaving your place at 7am you would just hit traffic, and be in the worst of it coming back. My suggestion- do it the night before after 8pm, or in the morning before 5am. Not even joking. I used to live in Long Beach and took the 405 each day, traffic was from 6:30am-8pm.
If you must use the 405 freeway, I suggest that you leave LA between 10:15 a.m. and 2:30 pm.