both-way signalling
91Power line communication — or power line carrier (PLC), also known as power line digital subscriber line (PDSL), mains communication, power line telecom (PLT), power line networking (PLN), or broadband over power lines (BPL) are systems for carrying data on a conductor… …
92West Somerset Railway — Locale Minehead, Somerset, England Terminus Bishops Lydeard …
93Railroad tie — While wooden ties dominate North American railways, concrete is widely used in other parts of the world. A railroad tie/railway tie (North America), or railway sleeper (Europe) is a rectangular item used to support the rails in railroad tracks.… …
94Montreal Metro — Not to be confused with Greater Montreal. Montreal Metro Info …
95Rail profile — Rail from 1896 Cross sections of flat bottomed which can rest directly …
96RMS Titanic — was an Olympic class passenger liner owned by the White Star Line and built at the Harland and Wolff shipyard in Belfast, Ireland (now Northern Ireland). On the night of 14 April 1912, during her maiden voyage, Titanic hit an iceberg, and sank… …
97Rail fastening system — Elements of a baseplate based rail fastening system 1. Screw for fixing plate to sleeper 2. Elastomeric pad supporting rail 3. Tension washer 4. Rail clamp 5. Tensioning bolt (nut not shown) 6. Baseplate …
98Ramp meter — Metered ramp on I 894. A Portland, Oregon ramp meter …
99Leptin — PDB rendering based on 1ax8. Available structures …
100Broadcast television systems — There are several broadcast television systems in use in the world today. An analogue television system includes several components: a set of technical parameters for the broadcast signal, a system for encoding color, and possibly a system for… …
