I'm sorry. That's what I wanted to say, but I couldn't. I'd made a mistake, and the woman was livid, but I couldn't apologize because we were in separate cars on a busy road. To let me know the extent of her wrath, she pressed hard on her horn for a good thirty seconds longer than average, then garnished the effort with her middle finger. I was terrified.
The thing was, I knew right away that I'd made a mistake, miscalculated the placement of the lane closure. If I'd cut in front of her in line for cheese curds at the fair, or in the security line at the airport, I would have apologized. She would know it was sincere and would be socially obligated to say, "That's OK." And it would be OK.
But in cars, we're cut off from each other, free to assume the worst. Our relationship with other drivers is adversarial as we compete for open pavement and curse those in our way. If you're particularly angry, you can use your cell phone as a weapon. Just take a picture of another car, and when your insurance company asks, blame them for your accident. Even if they weren't in the crash. Even if they have no memory of you. There is no place for "Sorry".
I'm thinking of making a bumper sticker that says, "I'm sorry." Or license plates. Maybe taping a sign to my back, because it's not just when I'm driving that I'm sorry. I'm sorry for so many things. And someday I hope to hear you say, "It's OK."