Lyric discussion by obstacle2 

Cover art for 405 lyrics by Death Cab for Cutie

Such a beautiful song. What I get from it is that he's in a relationship, they're middle age and they're way past the first stage of the relationship; it's getting to be older and tiring. I got that from "I missed the turning to your parents' house hours ago" which is something you do in serious relationships (see the partner's parents for lunch etc etc when it's not something you really want to do) and the fact he's missing the turning shows his lack of care, it doesn't matter to him anymore: "it's never ever been better than this" Finally I find his driving is therapeutic to him in a way, he can reminisce over his life with his partner and understand how they're not really happy. His driving down the 405, I think, is also metaphoric as I just don't think, generally speaking, he's happy with how things are: "lead me to an alcoholic summer" and is unhappy with his partner's behaviour: "you keep twisting the truth, that throws me askew"

So, to sum up, I think it's about a tiring, no longer very happy relationship, and the man seeks that relief (in alcohol and the drive etc)

Song Meaning