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Railway signal in Ploiești West railway station, Romania. This type of signal is based on the German Ks signals. The signal head is the portion of a colour light signal which displays the aspects. To display a larger number of indications, a single signal might have multiple signal heads.
The signal's aspect is based on a combination of the aspects each individual head displays. Where a signal has multiple heads, aspects are read from top to bottom and are described as "X over Y over Z". Dwarf signals are smaller signals used in low-speed or restricted-clearance areas. Most signaling aspect systems have a parallel set of aspects ...
The NORAC rule book illustrates all signal aspects and indications which may appear on track operated by member railroads. However, GCOR does not illustrate signal aspects and indications because of the lack of uniformity between the participating railroads. Signal aspect and indication illustrations instead appear in each railroad's system ...
A signal is provided at the start of every section, which may only display a 'proceed' aspect when the section ahead is completely empty, at least as far as the next signal. The length of the sections, and hence the distance between signals, determines the railway's capacity.
The equipment was built and installed by General Railway Signal and Union Switch and Signal. The NYCTA contributed between $20,000 to $30,000 on the project and supplied the three R22 subway cars to be automated. The bulk of the money, between $250,000 and $300,000, was contributed by the two companies, which paid for installation, maintenance ...
A Class 66 locomotive (right) is waiting at a red signal while a First Great Western (now Great Western Railway) passenger train (left) crosses its path at a junction. Railway signalling (BE), or railroad signaling (AE), is a system used to control the movement of railway traffic.
It can show a green aspect (the next signal is open without restrictions), double yellow (the next signal is at the stop aspect), green-yellow horizontal (the next signal requires a speed reduction) or green-yellow vertical (double warning in the case of a short section between the next signal and the signal after that, which has a red aspect ...
Pages relating to railway signals and signal-related devices, technology and terminology. Subcategories This category has the following 13 subcategories, out of 13 total.