Well, that's the probability, that's the expected number of cars in an hour divided by number of seconds in an hour. And we're going to have k successes, and then we're going to have, and these are the failures, the probability of failure, and you're going to have 3,600 minus k failures. And this would be even a better approximation. This actually would not be so bad, but still you have the situation where two cars can come within a half a second of each other, and you say, oh, OK, Sal, I see the pattern here. We just have to get more and more granular. We have to just make this number larger and larger and larger, and your intuition is correct. And if you do that, you'll end up getting the Poisson distribution.