RIOHResearch Institute of Highway (Ministry of Transportation; China)
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RIOH risk scores are indicated by the injury accident rate calculated by basic accident rate and the influence of actual traffic safety factors.
In RIOH model, highways are separated into general segments, village segments, and intersections.
Road network was surveyed using RIOH's existing survey method, including two video cameras, GPS, and recording of observations by road engineers.
However, as there are only 63% accidents which have detailed location information, the total accident number is actually about 242.3 per year, which shows that RIOH results underestimate the level of risk on the roads.
(from left) Nasa Ahmed, Claudia Jackson, Gemma Pilgrim-Greaves, Nisa Patel, Rioh Burke-Darby and Ben Lyons involved in the Question Time-type discussion on oath of allegiance.