Proposal:Contact line
| detailed contact line | |
|---|---|
| Proposal status: | Draft (under way) |
| Proposed by: | reDoubleYou |
| Tagging: | electrified:contact_line=* |
| Applies to: | 
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| Definition: | There are different electrification systems within the overhead contact lines. |
| Statistics: |
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| Rendered as: | hidden, maybe OpenRailwaymap or similar |
| Draft started: | 2024-12-23 |
Proposal
This proposal suggests introducing the new Key electrified:contact_line for capturing the type of overhead contact lines.
Rationale
At the moment, it can be maped, how a track is electrified by the described values of electrified. One of them is electrified=contact_line. But there are various types of overhead contact lines. This diversity can't be mapped by the exiting tags. Replacing the existing tag electrified=contact_line by the values listed below would not be expedient, as this change would involve extensive adjustments to the existing database. The aim is therefore to concretise the already mapped value electrified=contact_line with the tagging proposed below.
Tagging
specification of the type of the contact line
| Key | Value | Description | Photos |
|---|---|---|---|
| electrified:contact_line | trolley-type | simple, so called trolley-type contact wire without a continuous catenary wire, just the contact wire | 
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| catenary | overhead contact lines with catenary suspension, consisting of one (or two) supporting catenary wires located above the contact wire(s) | 
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| rail | overhead conductor rail installation (soffit conductor rail or conductor rail with clipped-in contact wire) | 
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details for catenary overhead contact lines
In the case of a catenary system (proposed to be tagged with electrified:contact_line=catenary), there are different types and characteristics of catenaries that can be mapped by the following tagging:
| Key | Value | Description | Photos |
|---|---|---|---|
| catenary | simple | simple catenary system with messenger wire and contact wire connected with dropper wires | 
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| stiched | catenary systems that consist in comparison to the "simple" system described above of additional Y-wires at catenary masts | 
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| compound | catenary systems that consist in comparison to the "stitched" system described above of additional auxiliary messenger wire | 
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| catenary:muffled | yes | if the catenary has dampers | 
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Also at catenaries there is usually one contact wire and one catenary wire in the catenary system. However, there are also designs in which there are two contact wires or two catenary wires. It is proposed to map these cases with the following tags and the known values of wires=*. Note that it is proposed to not map catenary:contact_wire=single, catenary:auxiliary_wire=single or catenary:messenger_wire=single as the value single is assumed by default.
| Key | Value | Description | Photo |
|---|---|---|---|
| catenary:contact_wire | double | added, if the catenary system has a doubled contact wire | 
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| catenary:auxiliary_wire | double | added, if the catenary system has a doubled auxiliary messenger wire | I've never heared about that, but we are prepared of that |
| catenary:messenger_wire | double | added, if the catenary system has a doubled messenger wire | 
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It is also possible to combine these tags to represent the existing infrastructure.
Applies to
The proposed tag applies to ways that are tagged with electrified=contact_line.
Examples
| Photo | Tagging |
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Rendering
No changes at OSM carto rendering.
Features/Pages affected
- Page of electrified=contact_line must be updated.
- Page of Openrailwaymap/Tagging could be completed.
Comments
Please comment on the Proposal_talk:Contact_line.