This paper regards the operation of rural public transport services provided by pickup trucks and minibuses in Cambodia. Presented are survey data revealing how pickup modifications, especially cargo area canopies, are used to increase passenger and cargo capacity. A particular emphasis is placed on the importance of pickup transport services to economic activity. The results reveal that passengers traveling for economic reasons constitute 66 percent of passengers and carry 77 percent of the cargo weight. Transport operators may be modifying vehicles in response to their passengers’ commercial requirements. This paper highlights both the economic benefits and safety risks of such modifications.