Transport reforms generally increase the scale and scope of economic (mostly for freight) and social interactions (mostly for passengers). There are a wide range of economic benefits expressed by transportation systems, some direct (capacity and efficiency), some indirect (scale access and economy) and some motivated (multipliers and opportunities). They are affecting the economy along with transport supply and demand: Also See: 
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direct effect. Direct benefits are mostly related to capacity and efficiency improvements that affect users and operators, especially in terms of time and cost savings. Corporations involved in the provision of transportation services earn an income and are paying wages to their employees. MaxiCab
Indirect effect. Indirect benefits are mostly related to accessibility and better economies of scale. Although employers and the retail sector (as well as other activities such as institutions) gain better access to labor or customers, customers of goods transportation services (distribution centers, manufactures, retailers) receive some productivity gains that are the result of better transportation. Services. Landowners also typically receive higher fares from the increasing intensity of passenger and freight traffic occurring in the surrounding area. Both passenger and freight express additional demands for goods and services (such as fuel, maintenance, repair, insurance). Freight related activities also leverage its inputs and suppliers for their output on a wider scale of markets.
Induced effect. Induced profits are mostly related to economic multipliers and increased opportunities. A society benefits from increased mobility because individuals have wider choices for their activities and related social opportunities (education, social interaction, leisure). An economy usually becomes more competitive, attracts new and expanded economic activities and has more complex distribution networks. At this stage, transportation becomes a factor promoting economic competitiveness.