The significance of public transport is undeniable which has further increased with the increase in population. With a population of 14.91 million people, public transport available in Karachi is both inadequate and inefficient. The growing number of private cars on road has added to traffic, pollution, and congestion. In order to determine the impact of dissatisfaction towards the quality of public transport on preference towards private vehicles, a survey was distributed among 76 respondents. Evaluation of results partially proved the hypothesis and showed that dissatisfaction towards consistency of transit time, comfortability, and quality are the key determinants of use of private vehicles while dissatisfaction towards fare charges and walking distance to stop was found to have no influence on this preference.