PURPOSE: To prevent the lawn of golf links from being damaged by detecting the travel stop of a working vehicle by the operation of a speed change control part and, based on the detected results, braking travel wheels suddenly for locking them.

CONSTITUTION: When a travel setting part 43 as a transmission control part is operated to a neutral position, HST5 is set to a neutral position to set a travel setting target signal from the setting part 43 at neutral position. Then a signal from a speed change position sensor 22 is set at neutral position, and sent to a control unit 8. In the control unit 8, a braking wait time is set in a brake wait timer. When it is detected by a travel stop detector means that a specified time has been collapsed, a brake device is braked. Accordingly, while front and rear wheels 2 and 3 are rotating immediately after the travel setting part 43 has been shifted to the neutral position, the brake is not braked, but it is braked after the front and rear wheels 2, 3 have been stopped. Thus any lawn will not be damaged.