Do you drive a small black car? On Tuesday afternoon, were you cut off by a red Toyota on the ramp from eastbound 401 to northbound 404?

You managed to swerve and avoid an accident that could have sent you into the guardrail with serious injuries and also tied up traffic for hours. Still, you didn’t give the finger to the driver of the other car, a 52-year-old grandmother who is very, very sorry about what happened.

In fact, she feels so badly about being in the wrong and “almost creaming’’ you that she “didn’t sleep” Tuesday night and wrote a letter of apology to the Toronto Star in hopes that you’d see it:

“I would like to put in your paper an apology about a stupid and dangerous act that was orchestrated by none other than myself.

“I dangerously cut a car off on the ramp from eastbound 401 to northbound 404. It was a stupid act of being in a hurry and almost creaming a poor guy coming on the on ramp to go north. I didn’t look properly. He had to do an amazing swerve and avoided an accident that would have tied up that ramp in rush hour. He did a stellar job and I did not.

“If there is a place in your paper you could put this I would appreciate it. I would like to say sorry to him in his black, small car and thank him for dealing with an idiot like me on the road. This happened at about 3:10 give or take, on Tuesday afternoon. (I was too busy driving like a wild woman to even notice the time.)

“I was late to pick up my granddaughter and was totally engulfed in my own, obviously dangerous world. Thank you, sir for not reporting a maniac like me, and I’m sorry for causing you stress. Thank you for being a pro, unlike me.’’

The Star has been in touch with the letter writer, who fears negative ramifications at her workplace were her name to be published.

But she would “so love’’ to be able to pass on her sincere apology for what happened.

“It was totally my fault. It really bothers me. I must have ruined his day. He probably went home and told his family about it ... that idiot driver.’’

The letter writer says she has never been in an accident and is normally a good driver. But she had made a commitment to her daughter, who lives north of the city and had an appointment, to babysit her baby granddaughter. She had been forced to work a half-hour late. When she left work, near York Mills and 401, it was just after 3 p.m. and she was already late — she’d promised to meet her daughter in Newmarket at 3:10 p.m. She arrived much later.

“I’d go to the ends of the earth for my kids and I was in a hurry because I’d made that commitment,’’ she says. “I was so hyped up. I was in a mad panic.’’

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But she’s not trying to use that as an excuse. “I was an idiot and I’m just really sorry.’’

“I hope he sees this.’’