A traveling control method for performing a smoothing work or the like through an operation of a working device during traveling is provided. The traveling control method includes a first step of inputting a set value of a delay time of a traveling switching function of a traveling switching valve; a second step of inputting in real time an operation signal value according to a user's operation of a joystick and a traveling pedal; a third step of determining whether to operate the traveling and working devices according to the operation of the traveling pedal and the joystick; a fourth step of switching the traveling switching valve to a traveling switching mode through control of the electronic valve and returning to the second step when the traveling pedal and the joystick are simultaneously operated; a fifth step of determining whether the traveling pedal is operated and the operation of the joystick is temporarily stopped for a predetermined time; a sixth step of determining whether the set value of the d
