Which Train Side is built around route data, geographic evidence, and calculated results. The purpose of this policy is to explain how that information is reviewed, updated, and presented before it appears on the site.
The site aims to keep route recommendations useful, traceable, and consistent with the underlying railway and geographic data. When source data changes materially, the affected route can be recalculated rather than continuing to display an older result that no longer matches the current geometry.
What Is Verified
Verification focuses on the parts of a route result that can materially affect a traveler’s decision.
These include:
- origin and destination stations,
- railway route geometry,
- direction of travel,
- mapped scenery near the railway,
- names and positions of geographic features,
- left, right, or both-side classifications,
- route-level scenery recommendations,
- confidence values,
- sun exposure calculations where available.
Not every field is verified in the same way. Station and route information may come from railway datasets, while scenery locations can come from geographic map data. Calculated fields are generated from those underlying sources.
Railway Data Checks
Railway data is checked for consistency before it is used to generate public route results.
Important checks can include whether stations appear in the expected order, whether route geometry connects the relevant sections of track, and whether duplicate operational patterns represent the same physical railway.
When several train services use the same physical corridor, the underlying track section does not need to be treated as a separate geographic route for every service. Physical railway sections can be consolidated while preserving the service information needed to identify the journey.
Scenery Data Checks
Mapped scenery is evaluated based on its geographic relationship with the railway.
Where names are available, features are checked for duplicate or fragmented representations. A river or lake may be stored as several separate map objects, but that should not cause the same real-world feature to be counted repeatedly as if it were several different attractions.
Unnamed features can still contribute to the scenery calculation when their mapped geometry is useful, but they are generally not presented publicly as named locations.
Route Geometry and Data Matching
Scenery results are tied to the railway geometry used during analysis.
A route result is not treated as current merely because the origin and destination names remain the same. If the underlying geometry changes, the previous result may no longer describe the same physical path.
For this reason, route geometry can be matched using identifiers derived from the physical segment and its geographic shape. When a material geometry change is detected, the older scenery result is not automatically carried forward as though nothing changed.
Directional Verification
A scenery feature can only be labeled left or right when the direction of travel is known.
The same geographic feature can appear on opposite sides when a journey is reversed. Directional results are therefore based on the orientation of the railway rather than fixed labels attached permanently to a location.
Reverse-direction results reuse the same physical scenery evidence while changing the passenger perspective. Sun exposure is recalculated separately because it also depends on the selected date and time.
Confidence and Uncertain Results
Which Train Side does not force every route into a strong left-or-right recommendation.
If scenery evidence is relatively balanced, a route can be classified as BOTH. If the available evidence is weak or insufficient, the system can withhold a decisive directional recommendation rather than presenting unsupported certainty.
Confidence reflects how strongly the available geographic evidence supports the displayed result. It is not presented as a guarantee that a particular seat will have an unobstructed view throughout the journey.
Sun Calculations
Sun exposure is calculated from the route location, railway direction, date, and time.
The calculation determines the expected solar direction relative to the train. It does not depend on manually entered labels such as “sunny side” or “shaded side.”
Because sun position changes continuously, these results are generated dynamically. A change to the selected date or time does not represent an editorial update to the underlying route data.
When Route Data Is Updated
Route information can be updated when there is a meaningful change in the underlying data.
Examples include:
- a railway operator publishes updated route geometry,
- a station is added, removed, renamed, or repositioned,
- a route is materially rerouted,
- new geographic information becomes available,
- a mapped feature is corrected or renamed,
- an error is found in a previous analysis.
Small presentation changes, styling adjustments, or user-selected sun times do not by themselves represent a route data update.
Last Modified Dates
Dates associated with route data are intended to represent a meaningful change to the route analysis rather than the moment a page is viewed or a sitemap is generated.
When a route is recalculated because its underlying data has changed, the relevant modification date can be updated. Cosmetic changes that do not alter the route result are not treated as a new geographic analysis.
Automated Processing
Some parts of Which Train Side are produced through automated geographic processing. This is necessary because a large railway network can contain hundreds or thousands of physical segments and many more possible journeys.
Automation is used to apply the same calculation rules consistently across the network. It does not mean that every mapped object is accepted without checks or that every possible result is forced into publication.
Automated processing can identify anomalies such as missing geometry, incompatible route shapes, duplicated features, or results that cannot be matched reliably to the current railway data.
Human Review and Corrections
Route data can be reviewed when a result appears inconsistent with the mapped geography, when source information changes, or when a credible correction identifies a specific problem.
Corrections are evaluated against the underlying data rather than accepted solely because a different result is preferred.
Where a correction is supported by better railway geometry, more accurate mapping, or a clear processing error, the affected route can be recalculated and updated.
What Is Not Considered Verified
Some real-world conditions cannot be established reliably from route geometry alone.
These can include:
- the exact railcar assigned to a service,
- seat orientation on a specific departure,
- window size or alignment with a particular seat,
- temporary vegetation or construction,
- weather and visibility,
- temporary operational diversions,
- short-term obstructions beside the railway,
- whether a distant feature is blocked by local terrain.
These factors can affect the real view from a train even when the geographic side calculation itself is correct.
Independence of Recommendations
Route recommendations are not assigned according to commercial relationships with railway operators, destinations, attractions, or tourism organizations.
Names of operators, services, stations, landmarks, and geographic places are used to identify the journey and its surroundings. They do not determine which side receives the stronger scenery result.
Reporting an Error
Specific error reports are most useful when they identify the route, direction of travel, and the part of the result that appears incorrect.
Examples include an incorrectly positioned landmark, a station naming problem, a route that follows the wrong track, or a left-right result that conflicts with the displayed railway geometry.
When a reported issue can be confirmed from reliable source data or reproduced in the route analysis, the affected information can be corrected.
Quality Over Forced Coverage
The goal is not to assign a confident answer to every possible pair of stations.
A route should have enough railway and geographic evidence to support a useful result. Where the data is incomplete, ambiguous, or too weak to distinguish one side meaningfully, it is better to show a balanced or unavailable result than to manufacture precision.
This approach keeps the site focused on practical route guidance supported by the available geography rather than maximizing the number of directional claims.