A quantitative measurement of tourist off-road driving was conducted in Masai Mara National Reserve, Kenya. Off-road driving was simulated in a grassland area of the Reserve that was heavily used by tourists. A mathematical model was employed to estimate the overall impact of tourist off-road driving on the Reserve's grassland communities.
The results of off-road driving simulation experiments showed that damage increased with the number of vehicular passes. Off-road driving was more destructive to the vegetation at the loops than on the straight. The magnitude of the estimated loss due to extrapolation of the findings of the simulation experiments to the whole reserve was very small. The aesthetic quality of the reserve was, however, adversely affected by the off-road driving, as was, doubtless, the privacy of the animals.