Travel control system and travel control method

A travel control system and a travel control method. A travel control system for a vehicle provided with a drive source, a wheel having a wheel body connected to the drive source via a power transmission member and having a tire mounted on the wheel body, and a brake device for braking the wheel, the travel control system including: an estimation unit configured to estimate a travel of the vehicle; an estimation unit configured to estimate a tire torsional stiffness and a road surface friction coefficient based on at least a rotational speed of the driving source, a rotational speed of the wheel body, a vehicle body speed, and a torque applied to the wheel body; and a control unit configured to control at least one of the driving source and the braking device such that the tire does not exceed an adhesion limit derived from the tire torsional stiffness and the road surface friction coefficient. 行进控制系统和行进控制方法。一种用于车辆的行进控制系统，该车辆设置有驱动源、轮以及用于制动所述轮的制动装置，所述轮具有经由动力传递构件连接到所述驱动源的轮体，并具有安装在所述轮体上的轮胎，所述行进控制系统包括：估计单元，其配置成至少