Abstract
While motorcycle is the most favorable vehicle kind in Vietnam, their necessary data are very poor. All gathered facts consist of accumulative registered amount (Mreg) and some associated ones. But important information such as data on motorcycles in current traffic circulation (Mcir) is quite absent. Such usage of registration records instead of real data is background for high incorrectness in related policies/countermeasures.
To cover this gap, the paper presents an estimation of different kinds of essential data for motorcycles in traffic circulation until 2014 and also presents a fresh forecast on amount of motorcycles until 2025.
With found data, impacts of socio-economic conditions on the growth of motorcycles are considered and it shows that in contrary to strong impact in long-term, the impact in short-term is very weak that means the existence of additional influence factors. This conclusion has great practical meaning for policy-making in different terms.
