As of 1861 rail tracks for public transportation - streetcars were planned along Green Bay Road (Clark Street) and Evanston Avenue (Broadway). The residents along Evanston Avenue would have a hate/love relationship with the new technology of its day. The residents loved their horses and did not like private companies telling them what they needed.
A steam engine called the 'dummy' train was used along Evanston Road (Broadway) from Fullerton Avenue (north boundary of Chicago) to Graceland Cemetery (at Montrose) during 1870's. The first car of this steamed powered train was designed for the engine.
The engine was enclosed so that it would look like a passenger car, hence the name 'dummy'. The story goes that if the horses saw the engine they would get spooked. It was thought that the more familiar appearance of a coach presented by a steam dummy, as compared to a conventional engine, would be less likely to frighten horses when these trains had to operate in city streets.
Later it was discovered that it was actually the noise and motion of the operating gear of a steam engine that frightened horses, rather than the unfamiliar outlines of a steam engine.