Road surface condition estimating method, vehicle control method, and road surface condition estimating apparatus

The present invention provides a method of estimating a road surface condition, the vehicle control method, and a road surface condition estimation means. Road surface condition using a normal tire to employ variable pitch pattern of a tire for the tone detection to estimate with high accuracy the state of running road surface. Size detection by the acceleration sensor detects a road surface state, the rotation order ratio analysis unit by the number of rotational vibration of the tire of the tire than the analysis unit by the rotation frequency component extracting unit extracts a tire from the road surface condition estimation of the number of revolutions of component vibration and previously set threshold by comparing the estimated state traveling road surface, wherein the road surface status detecting a tire having blocks along the tire circumferential direction is less than the total number N of column 10 is provided with a block column n number of adjacent blocks along the tire circumferential direction, connected to each other lug groove in the connecting portion (N / 2) in the range of ≤n≤ (N-5) a.