Tractor

The tractor (1) has a load determining device e.g. capacitive pressure sensor, determining weight of a load and transferring the determined weight information to a control device. A driving direction inclination sensor and a lateral inclination sensor determine a current ground profile and pass the determined profile information to the control device. The control device limits driving speed of the tractor to a maximum allowed driving speed based on the determined load or the profile. The control device causes a signal generator e.g. lamp, to deliver a signal if the allowed speed is exceeded.