ISO26262 was intended only for passenger cars but can be applied to motorcycles if the Controllability (C) is subjectively evaluated by expert riders. Expert riders evaluate motorcycle performance from the viewpoint of ordinary riders. However, riding maneuvers of ordinary riders have not been confirmed by objective data. For this reason, it is important to understand the basic characteristics of riding maneuvers of both expert and ordinary riders. This study seeks to confirm the compatibility between the riding maneuvers of expert riders and those of ordinary riders.
The riding maneuvers and vehicle behavior of four expert riders and 16 ordinary riders were compared using the results of a test assuming normal running. Referring to the UN regulations and Japanese Automotive Standards Organization (JASO) that define test methods for objectively measuring the behavioral characteristics of two-wheeled vehicles in Japan, three tests (steady-state circular test, lane-change test, and braking test) were performed. These tests provided two results. Under low-difficulty test conditions, the distribution range of the riding maneuvers of expert riders were similar to those of ordinary riders. In contrast, under high-difficulty test conditions, the riding maneuvers of the expert riders were superior to those of ordinary riders. These results demonstrate that expert riders can evaluate test conditions from the standpoint of ordinary riders using objective data and can examine the range of safe test conditions for ordinary riders.