Traffic lights on railway transport
The traffic lights by appointment are divided into the following types:
1) entrance – allowing or prohibiting the train to follow from the stretch to the railway station;
2) weekend – allowing or prohibiting the train to go from the railway station to the stage;
3) route – allowing or prohibiting the train to proceed from one area of the railway station to another;
4) checkpoints – permitting or prohibiting a train to proceed from one block-section (inter-station haul) to another;
5) covers – for fencing the intersection of railways in one level by other railways, tram tracks and trolleybus lines, drawbridges and ections that pass with a conductor;
6) barriers – requiring stopping in case of danger to traffic arising at railway crossings, large man-made structures and landslides, as well as fencing trains for inspecting and repairing wagons on station railway tracks;
7) precautionary – warning of the indication of the main traffic light (entrance, passing, barrier and cover);
8) repetitive – for notification of the permissive indication of the output, route, entry (exit), technological and indication of the hill, shunting traffic lights, when under local conditions the visibility of the main traffic light is not provided;
9) locomotive – to allow or prohibit the train to follow the stretch from one block to another, as well as a warning about the indication of a traffic light, which the train is approaching;
10) shunting – permitting or prohibiting the production of maneuvers;
11) humps – allowing or prohibiting the dissolution of cars from the hill;
12) entry (exit) – allowing or prohibiting the entry of railway rolling stock into the production area and exit from it on non-public railways;
13) technological – allowing or prohibiting the supply or cleaning of railway rolling stock when servicing objects located on non-public railway tracks (wagon tippers, car scales, devices for restoring cargo flowability, discharging devices, etc.).
One traffic light can combine several appointments (input and output, output and shunting, output and route, etc.).
Light emitting diodes or incandescent lamps are used as light sources in traffic lights.
Traffic lights are used lens or floodlights; by location they are divided into mast, dwarf, as well as installed on bridges, consoles, trusses of bridges, walls of tunnels, and on railway tracks of non-public use also on the walls of industrial premises.
Signal lights at traffic lights are used: continuously burning, normally non-burning, non-blinking and flashing (intermittently lit and extinguished).
Normally non-burning signal lights of the traffic light in areas equipped with automatic blocking, light up when the train enters the block section in front of it and go out after the train leaves the block section.
The traffic light should be provided with a letter plate containing its designation. Auto-blocking traffic lights are denoted by numbers, all other traffic lights – by letters or letters and numbers. On double-track and multi-track hauls of newly-equipped permanently operating devices for organizing movement on the wrong railway track by locomotive traffic lights, the letter plate must be provided on the reverse side of the masts of traffic lights as well.
The main values of the signals given by traffic lights (regardless of the installation location and their purpose) are as follows:
1) one green light – movement is allowed at a set speed; the next traffic light is open;
2) one yellow flashing light – movement is allowed at a set speed; the next traffic light is open and requires it to be traversed at reduced speed;
3) one yellow light – movement is allowed with a readiness to stop; the next traffic light is closed;
4) two yellow lights, the upper one of which is flashing – the traffic light is allowed to pass at a reduced speed; the train follows a turnout switch; the next traffic light is open;
5) two yellow lights – a traffic light is allowed to pass at a reduced speed and ready to stop at the next traffic light; the train follows a turnout switch;
6) one red light – stop! It is forbidden to pass the signal;
7) one moon-white light – it is allowed for the shunting train to proceed with the shunting traffic light and further to be guided by the readings of passing traffic lights or directions (signals) of the head of the maneuvers;
8) one blue light – it is prohibited for a shunting train to proceed with a shunting traffic light. The use of these signals at traffic lights for various purposes is provided for in the relevant paragraphs of this annex. The order of application of these signals in other cases not covered by this annex with
Editor: Merabi Chaladze