Measurement day December 31, 2017 Namie-cho Fukushima Prefecture Route 114 → → Route 49 Route 2-1

Here is a soil contamination map of the area :

Source for radioactive contamination map and description; https://nuclear-news.net/2017/07/31/soil-radioactive-contamination-measurements-of-namie-fukushima/
Source for the screenshot of reading taken in a car :
kienaiyoru
Published on 30 Jan 2018
December 30, 2017 – December 31, 2017
Measurement time 7 hours 40
Movement distance 298 km
Movement fee 2857 yen
See Kienaiyoru YT channel description for details to donate to this ongoing thorough documentation of contamination areas in Fukushima Prefecture