Road signs traffic light designation. Types of traffic lights, the meaning of traffic signals
GOST 21.207-2013
INTERSTATE STANDARD
System of design documents for construction
SYMBOLS ON THE DRAWINGS OF ROADS
System of design documents for construction. Graphical signs for drawings of motorways
ISS 01.100.30
Introduction date 2015-01-01
Foreword
Goals, basic principles and the basic order of work on interstate standardization are established by GOST 1.0-92 "Interstate standardization system. Basic provisions" and GOST 1.2-2009 Interstate standards, rules and recommendations for interstate standardization. Rules for the development, adoption, application, updating and cancellation
About the standard
1 DEVELOPED by the Open Joint Stock Company - Center for Methodology, Rationing and Standardization in Construction (OJSC "CNS") together with the Closed Joint Stock Company "Design and Survey and Research Institute of Industrial Transport" (CJSC "Promtransniiproekt")
2 INTRODUCED by the Technical Committee TC 465 "Construction"
3 ADOPTED by the Interstate Council for Standardization, Metrology and Certification (ICC) (Minutes of November 14, 2013 N 44)
Voted to accept:
Short name of the country according to MK (ISO 3166) 004-97 | Abbreviated name of the body government controlled construction |
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Azerbaijan | Azstandard |
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Ministry of Economy of the Republic of Armenia |
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Kazakhstan | State Standard of the Republic of Kazakhstan |
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Kyrgyzstan | Kyrgyzstandart |
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Moldova-Standard |
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Rosstandart |
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Tajikistan | Tajikstandart |
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Uzbekistan | Uzstandard |
4 By order of the Federal Agency for Technical Regulation and Metrology dated December 17, 2013 N 2315-st, the interstate standard GOST 21.207-2013 was put into effect as a national standard Russian Federation from January 1, 2015
5 INTRODUCED FOR THE FIRST TIME
6 REVISION. April 2015
Information about changes to this standard is published in the annual information index "National Standards", and the text of changes and amendments - in the monthly information index "National Standards". In case of revision (replacement) or cancellation of this standard, a corresponding notice will be published in the monthly information index "National Standards". Relevant information, notification and texts are also posted in the public information system - on the official website of the Federal Agency for Technical Regulation and Metrology on the Internet.
1 area of use
1 area of use
This standard establishes the basic graphic symbols and simplified images used in the drawings of highways for various purposes.
2 Normative references
This standard uses normative references to the following interstate standards:
GOST 2.303-68 Unified system for design documentation. lines
GOST 2.306-68 Unified system for design documentation. Designations of graphic materials and the rules for their application on the drawings
GOST 21.101-97 * System of design documentation for construction. Basic requirements for design and working documentation
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*GOST R 21.1101-2013 applies on the territory of the Russian Federation
GOST 21.201-2011 Design documentation system for construction. Conditional graphic images of elements of buildings, structures and structures.
GOST 21.204-93 Design documentation system for construction. Conditional graphic symbols and images of elements master plans and transport facilities
GOST 21.302-2013 * System of design documentation for construction. Symbols in the documentation for engineering and geological surveys
GOST 21.701-2013 * System of design documentation for construction. Rules for the implementation of working documentation for roads
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* Introduced simultaneously with the developed standard
3 Terms and definitions
In this standard, the following terms are used with their respective definitions:
3.1 road markings: Lines, inscriptions and other designations used independently, in combination with road signs or traffic lights on the carriageway of a motor road, artificial structures and road construction elements, informing road users about the conditions and traffic modes on a road section.
3.2 road sign: Technical means of organizing traffic safety with signs and / or inscriptions informing road users about road conditions and traffic modes, location settlements and other objects.
4 General provisions
4.1 The designed roads are depicted on the drawings using conventional graphic symbols and simplified images (hereinafter referred to as symbols) established by this standard, taking into account the requirements of GOST 21.701, as well as using symbols established by GOST 21.204, GOST 21.302, GOST 2.306. GOST 21.201 and other related standards of the Design Documentation System for Construction (SPDS).
4.2 Symbols are performed on the scale of the drawing, except for images, the dimensions of which are defined in this standard and are given in millimeters or conventional units.
The types of lines used in the execution of symbols must comply with GOST 2.303.
4.3 Abbreviated inscriptions are accepted in accordance with the abbreviations adopted in road design, in the Symbols for topographic plans at scales 1:5000, 1:2000, 1:1000, 1:500, as well as established by GOST 21.101.
4.4 Symbols not regulated by the standards are given in the general data on the working drawings or on the corresponding drawings.
5 Symbols on road plans
5.1 The symbols used on road plans are performed in accordance with Table 1.
5.2 The width of the road on the plan is depicted on the scale of the drawing, but not less than 2 mm. If a numerical value images of the width of the road in the appropriate scale less than 2 mm, the projected road is depicted as a solid thick main line.
Table 1
Name | Designation |
1 Road: | |
a) with the designation of the road or route according to the list of highways | |
b) with the designation of the road surface Note - The numbers indicate the width of the road, the letters - the material of the coating. | |
Note - in enumerations a)-in) shows a simplified designation of the road for a scale of more than 1:5000. | |
2 Cover seams: | |
a) expansion seam | |
b) compression seam | |
c) false seam | |
d) offset seam | |
e) seam at the curb | |
3 Boundary of construction sites Note - Roman numerals indicate section numbers. To the left of the ordinate (leader line) indicate the picket position. | |
4 Sub-ditch drainage network with manholes | |
5 Slope drains | |
6 Spillway from the roadway | |
7 Road barrier | |
9 Gallery | |
10 Underpass | |
11 Overpass | |
Note - In paragraphs 4-11 on the shelves of the leader lines indicate the serial number of the structure, position number (brand), type or diameter of the device; under the shelves - the designation of the document for their implementation. |
6 Symbols on longitudinal profiles of roads
The symbols used when making longitudinal profiles of highways are performed in accordance with table 2.
table 2
Name | Designation |
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1 Road crossing | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2 Ramp or junction with the highway | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3 Interchange of highways at different levels: a- at intersection b- at the junction | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
4 Station and distances between breakpoints of the actual ground surface | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
5 Wrong picket | It is allowed to use the full image of the mark in the drawing in accordance with national standards*. The dimensions of road signs may be changed, however, their size must be sufficient to carry out the designation of the sign in compliance with the ratio of the established dimensions. Picture 1
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GOST 23545-79
Group P00
STATE STANDARD OF THE UNION OF THE SSR
AUTOMATED TRAFFIC CONTROL SYSTEMS
Symbols on diagrams and plans
Computer control systems for traffic.
Legends on schemes and plans
Introduction date 1980-07-01
DEVELOPED by the Ministry of Instrument Engineering, Automation and Control Systems, the USSR Ministry of Internal Affairs and the USSR State Committee for Standards
PERFORMERS
B.I.Raspopov, L.A.Yakushin, V.V.Vasyutovich (development leaders), V.V.Shirshova, V.N.Belov, Yu.B.Irz
INTRODUCED by the Ministry of Instrumentation, Automation and Control Systems
Head of the Scientific and Technical Department M.S. Shkabardnya
APPROVED AND INTRODUCED BY Decree State Committee USSR according to the standards of March 30, 1979 N 1168
INTRODUCED Change No. 1, adopted and put into effect by the resolution of the USSR State Committee for Standards dated 04/05/83 N 1623 from 09/01/83
Amendment No. 1 was introduced by the legal bureau "Kodeks" according to the text of IUS No. 7, 1983
This standard applies to documents on the organization of traffic, as well as electrical diagrams and plans for cable routes, performed on topographic plans of the area and building plans, and establishes symbolic and graphic symbols technical means, traffic management elements and methods for laying electrical communication lines used in the design of automated traffic control systems.
The terms used in this standard and their definitions are given in reference annex 1.
General requirements for the implementation of schemes - according to GOST 2.701-76 , GOST 24.302-80.
(Changed edition, Change N 1).
1. SYMBOLS
1. SYMBOLS
1.1. Graphic and alphabetic designations of technical means of ASUD, means of regulation and methods of their installation are given in Table 1.
A detailed decoding of technical means is given in a remote element in the free field of the drawing. The means of regulation are depicted together with the methods of their installation.
Table 1
Name | Notation |
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graphic | alphabetic |
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Travel controller | ||
Coordinator | ||
Switch cabinet | ||
Transport detector: | ||
inductive: | ||
checkpoint | ||
gatehouse and presence | ||
checkpoint, taking into account: | ||
directions | ||
speed | ||
flow composition | ||
flux density | ||
ultrasonic (gateway and presence) | ||
Inductive loop of transport detectors for cable route plans, electrical circuits and traffic organization schemes: | ||
when laying in the roadway | Notes: 2. - number of lanes. 3. \u003d 4 mm with a frame length of 2 m and more than 2 mm - with a frame length of 0.5 to 2.0 m | |
when laying under tram tracks | ||
for situational plans and documents for a comprehensive study of the organization of traffic: | ||
single-lane | ||
two-lane | ||
three-lane | ||
Remote control panel | ||
Information exchange device | ||
Stationary part of the set of equipment for the priority passage of vehicles | ||
The mobile part of the set of equipment for the priority pass of vehicles | ||
Managed traffic sign | ||
speed indicator | ||
road view camera | ||
Traffic light installation: | ||
Pedestrian calling board | ||
Simplified designation of a group of technical equipment on cable route plans and electrical diagrams | ||
Ways to install controls: | ||
on console | ||
on the wall | ||
stretching | ||
on the designed support | ||
on existing support | ||
on an existing column | ||
on the designed column |
(Changed edition, Change N 1).
1.2. The designations of the elements of traffic management are given in Table 2.
table 2
Name | Designation |
Traffic light: | |
transport three-section | |
pedestrian | |
tram | |
to control lane entry | |
Additional traffic light sections with direction indications: | |
right | |
left | |
directly | |
reversal | |
Tram traffic signals allowing movement: | |
left | |
directly | |
right | |
left and right | |
right and straight | |
Tram traffic signal forbidding traffic | |
Vehicle traffic: | |
allowed | |
forbidden | |
seepage | |
Pedestrian traffic: | |
at traffic lights | |
at pedestrian traffic lights | |
Traffic light signals in the timing diagram of the control mode: | |
green | |
red | |
yellow | |
red with yellow | |
green flashing | |
The on state of the tram traffic lights | |
Off state for additional traffic light sections in coordination programs | |
Road sign: | |
warning | |
forbidding, prescriptive | |
pointing | |
priority | |
Note. Next to the image of the sign, you must indicate its number in accordance with GOST 10807-78*. If there is an additional plate, it is necessary to indicate its number next to the image of the sign. | |
Roadway fencing |
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* On the territory of the Russian Federation is valid GOST R 52290-2004, hereinafter in the text. - Note "CODE".
(Changed edition, Change N 1).
1.3. The designations of the methods for laying electrical and telephone lines are given in Table 3.
Table 3
NameLaying in a trench | |
Laying communication channels and unprotected cables in one trench | |
Note. The positions of the cables are indicated on the leader shelves. On the first shelf indicate the cables laid in the trench, on the next - the positions of the cables laid in the communication channels | |
Cable laying with protection in a trench (pipe, box, plates, etc.) | |
Note. On the leader shelf indicate the type of protection and the length of the protected area | Change No. 1). |
Today, everyone understands what a traffic light is. Colors: red, yellow and green are familiar even to a child.
However, there was a time when these optical devices did not exist, and it was not very easy to cross the street. Especially in big cities passers-by had to pass endless horse-drawn carts for a long time.
There was confusion and endless disputes on the cross streets.
A small digression into history
Traffic lights were originally invented by the British. It was staged in London at the end of 68 of the 19th century. It was run by a man. The mechanism had two arrows. When they were in a horizontal position, movement was prohibited, and when lowered, passage was allowed. At night, a gas burner was turned on, with the help of which a red and green signal was given. It turned out to be unsafe. The gas exploded, wounded a policeman, the traffic light was removed.
Only at the beginning of the twentieth century in America was an automatic traffic light patented. Colors were not used in it, their inscriptions replaced them.
The red color is very clearly visible in any weather: when the sun is shining brightly, it is raining, or there is fog. From a physical point of view, red has the maximum wavelength. Perhaps that is why it was chosen as forbidden. All over the world, the meaning of red is the same.
The other traffic signal is green. This is the color of calmness, peace. It has a relaxing effect on the human brain. Green allows movement. It can be seen far enough, any driver sees this color long before the traffic light passes and calmly, without braking, overcomes the intersection.
However, as they say, there is an unwritten rule according to which it is still worth slowing down when driving through a dangerous intersection, even when the traffic light is green. This action often helps to avoid serious accidents.
Yellow - pay attention
The yellow color of the traffic light is intermediate. It has a warning function and encourages road users to pay attention. They say that yellow symbolizes the mind, intuition and ingenuity. It usually lights up after red, urging drivers to prepare for movement. As practice shows, many drivers perceive the yellow signal of a traffic light as permissive and start moving. This is wrong, although it is not punishable by penalties. When the yellow color lights up, you need to squeeze the clutch, get ready, but to start moving, it’s better to wait for the green one, especially since it’s only a couple of seconds to wait.
AT reverse order: green, yellow, red - the traffic light is not working. In modern devices, after the green, the red color immediately lights up, while in the last minutes the green starts flashing.
You can also sometimes see a continuously flashing yellow traffic light. This indicates that the traffic light is disabled or broken. Most often, traffic lights flash yellow at night.
Pedestrian traffic light
There is also a traffic light to regulate pedestrian traffic. What colors does it use? Red and green - definitely, but yellow is missing as unnecessary. A person does not need special preparation for crossing the road.
They are usually depicted as walking men. For the convenience of pedestrians recent times time counter is used. A special stopwatch counts how many seconds are left before the opposite signal is turned on.
As in conventional traffic lights, red indicates traffic is prohibited, while green indicates that the passage is open.
When passing through an intersection, drivers should be aware that pedestrians are taking advantage. So, for example, at a crossroads, a car turns right at a green traffic light, while pedestrians crossing a perpendicular road also light up green color. In this case, the motorist must give way to all pedestrians and only then continue driving.
What is a "green wave"
In large metropolitan areas, traffic on highways is accompanied by a large number of traffic lights that regulate traffic. The traffic light, the colors of which are known to everyone, switches them at a certain frequency. This frequency is automatically adjusted and ensures the safety of vehicles.
"Green wave" is tied to the speed of the car. It is assumed that, moving at a certain average speed, the driver, hitting the green traffic light, will also get green along the entire length of the highway. The three colors of the traffic lights switch at regular intervals, and there is consistency between a number of traffic lights. At all intersections of the route, coordinated according to this principle, there is the same cyclicity.
The "Green Wave" was developed for the convenience of crossing intersections; technically, this is not particularly difficult to implement. As a rule, signs are additionally installed on such highways with the recommended speed, which will ensure non-stop passage of intersections.
An assistant to the driver and pedestrian is a three-eyed traffic light. The colors switch in order and adjust the ride, ensuring the safety of all road users. Observing in good faith, you can avoid serious accidents and unpleasant situations on the roads.
Classic three-section transport traffic light.
Any of us knows from childhood that a red traffic light prohibits movement, and now both drivers are required to stop at the stop line.
But not everyone knows how a modern “advanced” traffic light works, what signals it can have and how exactly they alternate.
At the exam in the traffic police you will be asked:
What does the combination of red and yellow traffic lights mean?
The answer should not leave you in doubt - a short combination of red and yellow signals informs drivers that the green signal will turn on soon.
Red and yellow went out, green turned on, and you can move in all directions (unless, of course, otherwise indicated by signs or markings).
But do not rush to start moving. How many troubles and tragedies the author of these lines saw when the neighbors on the road blindly oriented towards the green signal. And this is not just advice, this is a requirement of the Rules.
Rules. Section 13. Clause 13.8. When the permissive signal of the traffic light is turned on, the driver is obliged to give way to vehicles completing the movement through the intersection, and to pedestrians who have not completed the crossing of the carriageway of this direction.
That is, before you start moving, you need to make sure that those who have now turned red have stopped. Someone may simply not have time to stop, and someone is in such a hurry that he is ready to slip through the intersection risking his life (it would be fine if only his own, but also someone else's).
Well, finally, the drivers on the intersecting road stopped at their stop lines, and now you can start moving. We are still green.
Green burned out, burned out and blinked.
And again, at the exam in the traffic police, someone will definitely get this question:
What does a flashing green traffic light mean?
And again, the answer is obvious - a flashing green signal informs drivers that its time is running out and yellow will soon turn on.
Is it possible to move on the green flashing? Do not doubt it is possible. Its duration is expiring, but it hasn't expired yet!
Another thing is that the green will blink for a short time - it will blink only three times, and then it will go out.
The green will go out, but then the yellow will light up. And here is what is said about the lone yellow signal in the Rules, in clause 6.2:
« yellow signal prohibits movement and warns of the upcoming change of signals.
And here it is important for the driver to understand!– If the lone yellow is on, then the next one will be red! That means you have to stop!
Now imagine that the yellow turned on when there were 5-10 meters left to the stop line. At a speed of 60 km / h, you can only keep the car by applying emergency braking! And even then, you will have to stop already at the intersection (having crossed the stop line and risking getting hit from behind). Novice drivers often do this (slow down sharply on yellow), and if an aggressive “experienced driver” was driving behind, then a blow from behind to a beginner in this situation is guaranteed.
Meanwhile, the Rules prohibit sudden braking anywhere and everywhere (except when it is necessary to prevent an accident):
Rules. Section 10. Clause 10.5. The driver is prohibited brake hard unless required to prevent an accident.
That is, if now the driver of the brown car brakes sharply, he will violate the requirement of paragraph 10.5 of the Rules. And in the event of an accident, both will be to blame - the driver of the red car is to blame because he did not keep a safe distance, and the driver of the brown car - because he braked unnecessarily sharply.
The Rules reacted to this situation with understanding and allowed movement to the yellow traffic light (if it is no longer possible to stop smoothly in front of the stop line):
Rules. Section 6. Clause 6.14. Drivers who, when the yellow signal is turned on, cannot stop without resorting to emergency braking, are allowed to continue further movement.
And you may be asked about this in the exam: “Are you allowed to continue driving if, when the traffic light turns yellow after the green one, you can stop before the intersection only by applying emergency braking?”.
And here the answer should be absolutely clear to you - allowed. Simply allowed, in any direction you want.
A lone yellow will not burn for long - in just a couple of seconds it will change to red, and the cycle will start over. But already on a red signal, drivers should definitely stop at the stop line.
And it's not all about traffic lights. If the traffic is not intensive, then it is irrational to keep drivers at the stop lines, and the traffic light can be transferred to the so-called yellow flashing mode.
That is, red and green do not turn on at all, and only yellow is turned on all the time. Moreover, it does not just burn, but it flashes at a frequency of once per second. This is how the Rules say about this signal:
Rules. Section 6. Clause 6.2. Yellow flashing signal allows traffic and informs about the presence of an unregulated intersection or pedestrian crossing.
In this situation, drivers must independently determine the order of passage, guided by general principle"interference on the right."
In the traffic police collection there is a problem (shown below), solving which you are often mistaken. Some of you choose the third answer for some reason. Most likely, because they inattentively read the question. And the question says "with a yellow flashing traffic light"! And, consequently, this intersection has become unregulated. And, therefore, it is necessary to be guided by the signs of priority.
Traffic lights with an additional section (or with two additional sections).
A classic three-section traffic light can be equipped with an additional section (right or left) or two additional sections (right and left).
Such “rationalization” makes it possible to significantly increase the throughput of the intersection, it is only important that drivers correctly understand the signals of such a traffic light.
And, first of all, it is necessary to understand that movement in the direction of the arrow is only allowed when the additional section is turned on.
For example, traffic to the right is now open.
And only to the right and nowhere else!
Everyone who needs to go in other directions should stand and wait for the main green signal to turn on.
The main green signal turned on, and pay attention - black contour arrows are applied on the main green signal.
This was not the case at a three-section traffic light, but for a traffic light with an additional section, the presence of contour arrows on the main green is a must-have!
Now movement is allowed only in the directions indicated by the contour arrows.
But now the movement is open in all directions.
1. Straight or left. 2. Only straight. And what should he do if he needs to go to the right? 1. You have to go to the next intersection. 2. You need to stand at the stop line and wait for the right arrow to turn on. Task comment Now the traffic light allows you to turn left and turn around. But this can only be done by those in the left lane. The driver of a brown car with such traffic signals can only go straight. |
Traffic lights designed to regulate traffic in certain directions.
Creative thought does not stand still, and the organizers of the traffic did not calm down that they proposed adding additional sections to the traditional traffic light. If necessary, you can put a classic three-section traffic light additional features without equipping it with additional sections.
You drive up to the intersection and see three traffic lights instead of one (according to the number of lanes in your direction).
It should be assumed that the action of each traffic light applies only to the lane over which it hangs. And since the red signal is on everywhere, it means that traffic from all lanes is prohibited.
Students. But why are red arrows burning instead of the usual round signal?
Teacher. This is done so that drivers, approaching the intersection, can change lanes in advance to the lane they need.
And the same arrows will be lit on the yellow signal, informing drivers about the directions in which they will be allowed to drive from this lane when the green signal turns on.
Now traffic is allowed from all lanes.
BUT!
It is necessary to adhere to those instructions that are dictated by arrows at traffic lights.
Traffic light with a flashing yellow signal.
The most dangerous intersections on the driver's path are an unregulated pedestrian crossing and an unregulated intersection. At these intersections, drivers must independently determine the order of passage, guided by the relevant requirements of the Rules.
Traffic safety can be significantly improved if the simplest traffic lights with one yellow flashing signal are installed at such intersections. The continuous flashing of the yellow signal informs the driver in advance of the approach to an unregulated intersection or pedestrian crossing.
There were no traffic lights at this intersection. We hung it here with the help of the Photoshop graphic editor.
But if he were actually here, this accident most likely did not happen.
And these two-way traffic lights with a yellow flashing signal are not at all superfluous at an unregulated pedestrian crossing.
Reversible traffic lights.
Until recently, we had roads with reverse traffic, almost exotic (although they were always in the Rules).
And today you can often see such a warning.
And here it is - a section of the road with reverse traffic.
There are appropriate markings on the roadway (double broken lines with long strokes), and reversible traffic lights hang above the lanes allocated for reverse traffic.
Now green arrows are turned on at all traffic lights, and while they are on, these three lanes are given for traffic in our direction.
On this section of the road, only one lane is allocated for reverse traffic. And now at the reversing traffic light we have a red cross on. And, therefore, now the reverse lane is given to drivers of the opposite direction.
In our country, right-hand traffic is accepted and, in principle, everyone understands that, freeing the reverse lane, you need to change lanes to the right.
Nevertheless, the Rules also provided for a three-section reversing traffic light - the yellow arrow, firstly, informs about the upcoming signal change, and, secondly, shows drivers where to change lanes, freeing up the reverse lane.
Now it's time for the driver of the blue jeep to turn on the right direction indicators and immediately change lanes to the right. At the next reversing traffic light, a red cross will already be on.
Traffic lights to regulate traffic across railroad crossings.
To regulate the movement of vehicles through railway crossings, the Rules provided for three types of traffic lights.
It can be either one red signal flashing at a frequency of once per second.
Or two alternately flashing red signals.
Or, together with two red signals, a white-moon signal can also be installed, which, if turned on, also flashes at a frequency of once per second.
Now let's see what the Rules say about this:
Rules. Section 6. Clause 6.9. A round white-moon flashing signal, located at the railway crossing, allows the movement of vehicles through the crossing. When the flashing white-moon and red signals are turned off, movement is allowed if there is no train (locomotive, railcar) approaching the crossing within sight.
That is, if one red signal flashes or two red signals flash alternately, movement through the crossing is prohibited.
If the white-moon signal flashes, traffic through the crossing is allowed.
If nothing is flashing, traffic across the crossing is also allowed. BUT! It's not just allowed. First, the driver must make sure that there is no (within sight!) of an approaching train. And if there is one, then movement through the crossing is prohibited.
In conclusion, we note that GOST allows the use of conventional traffic lights at a railway crossing.
Four-section traffic light with moon-white signals.
The use of such traffic lights makes it possible to organize conflict-free movement of route vehicles at intersections. We are talking about trams, as well as buses and trolleybuses, if they move along a lane specially allocated for them.
Now all four white-moon signals are turned on at the traffic lights and, therefore, the tram (bus, trolleybus) can move in all directions.
If the lower signal and the upper left signal are on, the tram (bus, trolleybus) is allowed to move to the left.
If the lower signal and the middle upper signal are on, the tram (bus, trolleybus) is allowed to move straight.
If the lower signal and the upper right signal are on, the tram (bus, trolleybus) is allowed to move to the right.
If the lower signal is off, then the tram (bus, trolley bus) is turned on “brick” - entry to the intersection is prohibited.
Now the tram is allowed to go straight or to the left, and we are allowed to go straight or to the right.
Indeed, a conflict-free movement.
Now the tram is allowed to go straight or to the right, and we will stand at the stop line.
Again, no conflict.
But now the tram will stop, and we can go in all directions.
And again, no conflict.