The major source of profits for promoters of interurban electric railroads was

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Real estate speculation was the major source of profits for promoters of interurban electric railroads. These promoters often purchased large tracts of undeveloped land outside of urban areas and then built electric rail lines to connect them with the city. As the rail lines were built, the promoters would subdivide the land into lots and sell it to investors for development. The increase in land value due to the improved transportation access would result in significant profits for the promoters.

The Major Source of Profits for Promoters of Interurban Electric