Sure, why not? It makes the trip more enjoyable for you and the poor kid who has to pee. If possible plan ahead a bit and ensure that you keep some extra clothes in the car for the kid to change into when you get to a place where he can do so. That way, you can assure him that it's not only "OK" to wet his pants, but that he will have dry clothes to change into when it becomes possible to do so.
Sure. why not.? Get kids pull up diapers. Many many and many people like them.
there should be no necessity to ask for ...
If a kid has to go and wants to wet his pants, he should do it.
Allow would mean they wouldn't get in trouble or punished because they lost control of their bladders or the pain was so bad they asked if they could just let go.
I wouldn't chastise a person of any age that was caught in a situation like that. That is very embarrassing to most people past age eight or so to get caught in traffic when a very urgent need and there is no way to get to the a restroom.
There is no need to make the situation become a very traumatic and/or humiliating experience. Treat the person like you would want to be treated. Give some respect and don't belittle the person who has had a genuine accident.
At the same time, it is cruel for the person who can hold it the longest (which often is the driver) to refuse to stop when restrooms become available.
The comment such as, "You should have gone to the restroom when we last stopped. We are not going to stop again until those that went to the restroom when we last stopped need to go again. You will have to hold it or **** your pants." That borders on abusive behavior by the person in charge.
Well, if you have a towel or a plastic bag or something so you don't ruin the car seat, I would argue that letting them wet their pants is better than making them suffer. Or perhaps you could let them wear diapers.