A few years ago, I went up to Indianapolis for an event with some friends. We were going to meet up with a person at a restaurant there. On the way up, we stopped at a Wendy's near Cincinnati. I downed a Coke, but I assumed I could hold it in until we got to Indy.
By the time we got to I-465 though, my bladder was beginning to churn. Then, when we got on I-465, traffic was stopped. Completely. And I had to go. Bad. It must have taken an extra hour to get to the restaurant on the north side of town.
When I finally got there, I just darted past the person we were there to meet and rushed to the restroom.
Then later there was the trip to Colorado. On the last day of the trip, through Illinois and Indiana, I had to stop to pee about once every 5 minutes. For no apparent reason. At one stop, I was leaving the restroom, then I needed to pee a second time.