I thought the long-term evacuation areas were determined by measured radiation exposure? http://fukushimaontheglobe.com/the_earthquake_and_the_nuclear_accident

I thought the long-term evacuation areas were determined by measured radiation exposure? http://fukushimaontheglobe.com/the_earthquake_and_the_nuclear_accident/3988.html http://fukushimaontheglobe.com/the_earthquake_and_the_nuclea... According to the Ministry of the Environment, radiation levels on the road peak at 14.7 microsieverts per hour, and average 3.5 microsieverts per hour. Officials conducted a test in which a car was driven at a speed of 40 kilometers per hour for about 42 kilometers through the no-entry zone, including the opened stretch between Futaba and Tomioka. It recorded a radiation level of 1.2 microsieverts, and very little radioactive material stuck to the car. Based on the results, the government gave the OK to reopen the 14-kilometer stretch, but only to automobiles, not bikes or pedestrians Though even in areas that have had evacuation orders lifted, residents have been (understandably) reluctant to return: https://www.newscientist.com/article/2125805-a-nuclear-ghost-town-in-japan-welcomes-back-residents-this-week/ https://www.newscientist.com/article/2125805-a-nuclear-ghost...