permissive signal
1Permissive Action Link — Eine externe PAL Kontrolleinheit. Sie kostete ursprünglich 290.000 US Dollar, bevor die Stückkosten schließlich signifikant reduziert werden konnten[1] Permissive Action Link (PAL) ist die Bezeichnung einer US amerikanischen… …
2Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …
3Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… …
4Automatic Block Signal — Basic Automatic Block Signals = Automatic Block Signal, or ABS, systems consist of a series of signals that govern blocks of track between the signals. The signals are automatically activated by the conditions of the block beyond the signal.… …
5Australian railway signalling — Just as the railways of Australia has suffered issues from incompatible rail gauges, the different states have tended to go their own way regarding railway signalling practice.New South WalesThe signalling system in New South Wales consists… …
6Unusual uses of traffic lights — Unusual uses of traffic lights, as used in various regional locations, may for example include traffic lights used in a non standard fashion, or in a non standard arrangement, or for specific traffic. Alternating Alternates (Flashing Lights) In… …
7Glossary of rail terminology — Rail transport Operations Track Maintenance High speed Gauge Stations …
8Application of railway signals — Semaphore stop signals protecting the convergence of two tracks into one The application of railway signals on a rail layout is determined by various factors, principally the location of points of potential conflict, as well as the speed and… …
9Japanese railway signals — This article explains railway signals in Japan.In Japanese ministerial decree defining technical standard of railway (鉄道に関する技術上の基準を定める省令 Tetsudō ni kansuru gijutsu jō no kijun wo sadameru shōrei), railway signals are defined to indicate… …
10Traffic light — The traffic light, also known as traffic signal, stop light, traffic lamp, stop and go lights, robot or semaphore, is a signaling device positioned at a road intersection, pedestrian crossing, or other location. Its purpose is to indicate, using… …
