block system

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block system

n.
A system for controlling and safeguarding the flow of railway trains in which track is divided into blocks, each controlled by automatic signals.
References in periodicals archive ?
Tenders are invited for Software maintenance, prophylaxis and updating of the block systems, monitoring systems, preparation of technical and economic indicators (TEM) and energy management (CEM) in TPP Maritsa East 2 EAD
Moreover, the tape is compatible with Lego, Mega Bloks, Kreo and 'most major toy building block systems.
Therefore, the valve block systems have an EHEDG-certified diaphragm sealing system.
They are fully compatible with the company's DrySyn MULTI, MULTI-M and MULTI-S heating block systems.
Different block systems are suited to different project requirements.
Railways installed centralized traffic control and auto block systems in 1970 and 1993 on main line from Karachi to Kotri but most of the existing systems are very old and obsolete, an official of Pakistan Railways said.
The Road-Ready road milling drum features Pro-Fit or Quick-Change block systems and is balanced to reduce machine vibration.
The standards include test methods, material specifications, practices, and guides and relate to manufactured materials such as mulches and tackifiers, biodegradable blankets, turf reinforcement mats, sediment retention and filtration devices, gabions, grout-filled mats, geotextiles, and articulating concrete block systems, as well as natural materials including soil, rock riprap, and willows and grasses.
They include coir block systems, densely packed coir logs, lightly packed coir wattles, bristle coir woven fabrics, and coir mattresses.
Only 8 mm wide, the 1180 fits Phoenix Contact, WACO, Entrelac and other block systems without consuming valuable space.
These independent input devices do not require expensive additions such as the bus-couplers and mounting racks needed by modular or block systems.
Since train-to-wayside communication is provided via two-way radio, the solution can be used as an overlay radio-based train control system to upgrade existing fixed block systems.