Long Island Railroad Signal System I. Introduction In many ways, Long Island’s transportation network is a remarkably robust system of rails and roads. With over 700 miles of track, 11 branch lines and 124 stations, the LIRR is the most extensive commuter rail network in the United States. Combined, Nassau and Suffolk have 11,500 miles of federal, state and local highways and roads, including some of the most heavily used expressways in the nation, such as the Long Island Expressway. Over the last two centuries, this system has grown along with Long Island’s population and economy. More importantly, it has to a great extent shaped this growth. The Long Island Railroad (LIRR) was once a subsidiary of the Pennsylvania Railroad (PRR). As such, …show more content…
Development To reduce transport disorder from errors in the work, we have developed a signal control system using optical Local Area Network (LAN). This system is replaced by electronic control of signal device into the usage of signal cables to control of signal devices by data transmission using optical cables instead. It transmits and receives control data and result data between a Logic Controller (LC) installed in a signal house at the station and a Field Controller (FC) embedded in a signal device through the optical network. A. Logic Controller (LC) A LC is the safety-related computer and controls signal devices on the railway line in place of the interlocking device. It has various control functions such as route control, signal indication control, automatic train protection (ATP) control and level crossing control. These functions were realized in separate controllers conventionally. The LC generates control data based on control directions from the traffic control system and result data from related signal devices, and sends the control data to signal devices that are connected to this system. In addition, software configuration of the LC solving problems about route control is written down in Chapter 5. B.