Radiation Monitoring

[Joe]

MB in order to gauge wind direction you can simply check the direction the wind is coming from or use a weather site such as xc weather, the fall out is not magic, it’s coming from an upwind source.
In Fukushima the population was initially evacuated to high ground for the tsunami and further evacuated out with the area for the nuclear incident.
So going back to your initial point, yes it’s possible to drive into an area with higher fallout levels but if you have monitoring equipment it gives you a chance to avoid it. That’s the main reason workers in nuclear plants use monitoring/dosage meters.
The ideal situation is to do what BP and yourself suggested and move to a safer area but that’s not always possible and with the Uk nuclear expansion a plant will be appearing near everyone pretty soon.