A computer-implemented method for traffic scheme control, comprising: obtaining green light waste time of each lane in each flow direction at a traffic intersection during a green light time period, wherein the green light waste time is obtained according to actual distances and preset safety distances between vehicles; obtaining a class saturation of each lane according to the green light waste time of each lane and the green light time period of a corresponding flow direction, and obtaining a class saturation of each flow direction according to the class saturation of each lane; obtaining a class saturation of each group of flow directions in a current control scheme of a signal controller according to the class saturation of each flow direction, and obtaining a class saturation of the current control scheme according to the class saturation of each group of flow directions in the current control scheme; determining a class saturation of each candidate control scheme according to the class saturation of each group of flow directions, a green light time period of each group of flow directions in a plurality of candidate control schemes pre-stored in the signal controller, and a green light time period of each group of flow directions in the current control scheme; and determining a target control scheme having a minimum class saturation according to the class saturation of each candidate control scheme, and comparing the class saturation of the current control scheme with the minimum class saturation, when the class saturation of the current control scheme is greater than the minimum class saturation, controlling the signal controller to control a next traffic cycle at the traffic intersection according to the target control scheme. obtaining green light waste time of each lane in each flow direction at a traffic intersection during a green light time period, wherein the green light waste time is obtained according to actual distances and preset safety distances between vehicles; obtaining a class saturation of each lane according to the green light waste time of each lane and the green light time period of a corresponding flow direction, and obtaining a class saturation of each flow direction according to the class saturation of each lane; obtaining a class saturation of each group of flow directions in a current control scheme of a signal controller according to the class saturation of each flow direction, and obtaining a class saturation of the current control scheme according to the class saturation of each group of flow directions in the current control scheme; determining a class saturation of each candidate control scheme according to the class saturation of each group of flow directions, a green light time period of each group of flow directions in a plurality of candidate control schemes pre-stored in the signal controller, and a green light time period of each group of flow directions in the current control scheme; and determining a target control scheme having a minimum class saturation according to the class saturation of each candidate control scheme, and comparing the class saturation of the current control scheme with the minimum class saturation, when the class saturation of the current control scheme is greater than the minimum class saturation, controlling the signal controller to control a next traffic cycle at the traffic intersection according to the target control scheme. <EOS>