Prior to the invention of the automobile, most law enforcement agencies patrolled on foot, horse or bicycle. The contact and the communication with the public was at an all time high and subsequently crime was at an all time low.
As technology progressed, police officers were taken off of their beats and put into cars that could respond to calls for service in larger areas.
As the police officers patrol area expanded, the officer's spent the majority of their time responding to calls for service.
Law enforcement agencies all over the United States have duly noted the loss of communication and cooperation that once existed between themselves and their communities and are taking steps to bridge this gap. This is being done through the re-introduction of bicycle units into the community.