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(Blue Diamond Road) Corridor Study - Regional Transportation ...

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3. Overview of Transit Modes RTC SR-160 <strong>Corridor</strong> <strong>Study</strong><br />

3.3.3 Infrastructure Elements<br />

All LRT/DMU systems have the following basic elements:<br />

Running Way Infrastructure<br />

Wherever LRT/DMU systems operate, running way<br />

infrastructure must be installed. These include track<br />

and a power supply system. The number of tracks<br />

affects the capacity of the system. Tracks are either<br />

single-tracked (for low frequency systems) or double<br />

tracked (for high frequency systems). Track can be<br />

placed in at-grade, elevated, or subterranean<br />

alignment. Grade-separated alignments reduce<br />

potential traffic and safety conflicts with other types<br />

of vehicles. On electric-powered light rail system, an overhead catenary system (OCS)<br />

must be installed to deliver power to the light rail train. On DMU systems, no OCS<br />

installation is required because vehicles are individually propelled by diesel engines,<br />

simplifying the system design somewhat and reducing systems costs.<br />

Stations<br />

A station for light rail can be as simple as a curb on<br />

a street. Typical application of LRT / DMU in the<br />

United States involves a more elaborate design with<br />

specially designed platform designs, canopies, and<br />

architectural features. Pedestrian linkages to the<br />

adjacent community are also a part of rail station<br />

designs.<br />

Fare Collection<br />

LRT/DMU Fare collection systems often involve pre-paid fare collection. This is most often<br />

accomplished through the installation of ticket vending machines and smart card readers at<br />

stations.<br />

Systems<br />

LRT/DMU systems typically involve complex systems such as signaling and control system,<br />

communications infrastructure, and safety and security systems.<br />

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