broad-gauge railway
Let an agent explain broad-gauge railways by gauge and country, describe interoperability solutions, and provide sourced network and history information.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain broad-gauge railways by gauge and country, describe interoperability solutions, and provide sourced network and history information.
A railway with track gauge wider than the 1435 mm standard gauge, such as 1520 mm in the former Soviet countries, 1524 mm in Finland, 1600 mm in Ireland and parts of Australia and Brazil, 1668 mm in Spain and Portugal, and 1676 mm in India, Pakistan, Argentina and Chile; gauge differences affect interoperability and require break-of-gauge solutions.
What it is for: Rail transport on wider-than-standard track.
It can be identify the gauge used in a country or line; explain break-of-gauge solutions; describe network history and extent; explain gauge conversion projects.
Distinguishing features
Wider than 1435 mm
Regional systems
Interoperability challenges
Historic choices
What it looks like
Railway track with rails further apart than standard gauge.
Physical character
standard gauge for comparison: 1435 mm
common broad gauges: 1520, 1600, 1668, 1676 mm - examples
How it is recognised
Wider spacing between rails
Distinct rolling stock
Narrow gauge is narrower than standard
Related models
is a kind of - category
is contrasted with - other gauge
is related to - other transport infrastructure
is related to - other transport route
In practice
Families and kinds
1520 mm and 1524 mm systems
1600 mm systems
1668 mm Iberian gauge
1676 mm Indian gauge
other broad gauges
Standards and regulation
National railway technical standards
UIC and EU interoperability specifications
Gauge conversion programmes
Failure modes and hazards
Break-of-gauge delays and costs
Confusing gauges in planning
Outdated network data
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Gauge Which gauge.
Gauges by region.
Country
Gauge by country.
Country
Gauge by country.
- Which gauge does this country or line use, according to the operator? provenance
- Why was it chosen historically? provenance
Measure
Definition.
Measure
Definition.
- How is track gauge measured? definition
- Which gauges count as broad? boundary
Interoperate Crossing gauges.
Solutions exist.
Break
Break of gauge.
Break
Break of gauge.
- How are passengers and freight transferred at a break of gauge here? provenance
- Which variable gauge or bogie exchange systems are used? provenance
Conversion
Gauge conversion.
Conversion
Conversion.
- Which gauge conversion or dual gauge projects exist, according to official plans? provenance
- What are the costs and benefits? measurement
Network Extent and services.
Data need sources.
Extent
Network size.
Extent
Network size.
- How long is the broad-gauge network in this country? measurement
- Which major routes use it? provenance
Travel
Passenger travel.
Travel
Travel.
- How does gauge affect international journeys from this country? provenance
- Which through services exist? provenance
History Origins.
History explains gauges.
Origins
Why broad gauge.
Origins
Origins.
- How did this broad gauge come to be adopted, according to railway historians? provenance
- Which engineers advocated it? provenance
Heritage
Preserved lines.
Heritage
Heritage.
- Which heritage broad-gauge railways can be visited? provenance
- Which rolling stock is preserved? provenance
What the second pass must settle
- Should each gauge be a separate entry?
- How should network maps be linked?
- How should conversion projects be tracked?