Whereas it has become increasingly important to analyse and minimize the causes of discomfort to pas-passengers while moving with the high speed in automobiles. The discomforts arise from the vibrations that a passenger is subjected to and the noise that he is exposed to. Suggestions have been made in this paper to improve the comfort with respect to the design of the roads from the point of view of vibration. The presence of bumps or other irregularities on the road etc. A simple practical method to determine the dominant natural frequencies of a vehicle is illustrated.