No matter how good this car is, it would be impossible for it to protect them at all times. Moreover, the member of the International Agents Association would have to roam around the radioactive zone for a long period of time.
Even if they have survived the International War and perhaps human's tolerance for the radioactive has gotten higher compared to the people before that war, but it was still impossible for them to stay beside radioactive source for a long period of time.
The irreversible effects on human bodies made it impossible for them to stay out no matter how much they wanted to.
The International Agents Association was the same.
They did have mission to protect the people from the radioactive zone and also to investigate the radioactive concentration in various areas. There were also some other mission related to the radioactive zone, but Arya didn't remember the specifics.
There were too many.
