One of the secrets of the rapid expansion of Portland's trolley system c.1900-1910 was real estate development.
For example, when service began to Gresham it was a hamlet of 100 souls. A year later 1,000 people lived there. Mind you these are electric trolleys, so they bring more than a fast way to get from A to B, but light (yesteryear's Portland Railway Light and Power Company, today's PGE) and power¦ MODERNITY through ELECTRIFICATION ! !