[ PICTOGRAM CASE HISTORY ]

Material Symbols Railway Alert 2 Icon (Outlined). Needs intervention.

Visible referent: railway alert 2 numeric. Intended message: The icon must communicate Railway Alert 2 in a digital interface.. The report separates observed asset evidence, submitted context, and public evidence signals.

0.61

PCS

0.40

CLL

0.48

NTR

[ FEATURED PICTOGRAM ]

Paper

Ink

pictoclarity / material-symbols-railway-alert-2-outlined

Output - Material Symbols Railway Alert 2 Icon (Outlined)

Assessing the communicative effectiveness of the Railway Alert 2 icon

This reviewed catalog report estimates clarity for Railway Alert 2 in default interface contexts. Scores are screening estimates and do not replace user testing.

Mobile appWeb appDesktop app

0.61

PCS

PictoClarity Score

0.40

CLL

Convention Learning Load

0.48

NTR

Neurocognitive Transfer Risk

Read Evidence→

[ HOW THE CASE READS ]

From Input To Public Evidence.

The application stores structured evidence. The public page turns it into a readable pictogram case history.

Submitted Context

Framework output for the Material Symbols Railway Alert 2 icon in the outlined style.

Primary Finding

Primary referent: railway alert 2 numeric.

Metric Reading

Implied function: The icon must communicate Railway Alert 2 in a digital interface..

Public Recommendation

Conduct representative user testing across diverse user groups to validate comprehension and identify confusion risks before publication.

[ EVIDENCE SCREENING ]

What The Estimate Surfaces.

Semantic Transparency Score

Input

Expected

→

Estimated

0.53

Confusion Risk Index

Input

Possible

→

Estimated

0.54

Readability Test Score

Input

Visual

→

Estimated

0.75

PictoClarity Score

Input

Estimated

→

Estimated

0.61

Needs intervention 0.61

The pictogram carries meaningful clarity risk. The estimate applies to this pictogram, this meaning, and this public context.

Last Reviewed

Jun 24, 2026

[ SCORE SCALE ]

The Public Verdict Has A Range.

The level explains the estimated context. It is not a certification.

0.80-1.00

Strong clarity

The pictogram communicates well in this context.

Use it, then keep testing with real users.

0.65-0.79

Usable with support

The pictogram works with labels or context.

Pair it with text and monitor interpretation.

0.50-0.64

Needs intervention

Current report

The pictogram carries meaningful clarity risk.

Improve the symbol before relying on it.

0.00-0.49

Not reliable

The pictogram does not communicate enough alone.

Replace it or add strong alternative support.

[ CONVERGENCE PROFILE ]

Where Meaning Converges.

The profile compares visual evidence, semantic extraction, cultural recognition, time, and cognitive context. It describes estimated convergence, not universal validity.

Convergent meaning profile

The radar shows where meaning converges. It does not certify universal validity.

Area

0.26

Balance

0.69

Perceptual

0.75

Semantic

0.53

Functional

0.57

Cultural

0.31

Temporal

0.57

Neurocognitive

0.59

Context Independence

0.57

Collective Resonance

0.24

Weakest Axis

Collective Resonance

How strongly public evidence supports shared recognition and persistence.

Strongest Axis

Perceptual Convergence

How strongly visual form survives size, blur, contrast, and detail loss.

Convergent meaning profile
Axis	Score	Description
Perceptual Convergence	0.75	How strongly visual form survives size, blur, contrast, and detail loss.
Semantic Convergence	0.53	How strongly extracted meaning converges on one interpretation.
Functional Convergence	0.57	How strongly the symbol maps to the intended function.
Cultural Convergence	0.31	How strongly recognition holds across cultural evidence and assumptions.
Temporal Convergence	0.57	How strongly meaning persists over time without semantic decay.
Neurocognitive Convergence	0.59	How strongly the symbol follows AAC pictogram reading: transparent referent, concrete action, low convention load, and support.
Context Independence	0.57	How strongly meaning survives without external labels or placement cues.
Collective Resonance	0.24	How strongly public evidence supports shared recognition and persistence.

Evidence Notes.

8 Findings Published

Evidence

Primary referent: railway alert 2 numeric.

Evidence

Implied function: The icon must communicate Railway Alert 2 in a digital interface..

Evidence

Metaphor type: functional.

Evidence

The icon's primary referent is a numeric 'Railway Alert 2', intended to communicate a specific railway alert status in digital interfaces.

Evidence

Visual metrics indicate strong perceptual robustness with good resilience to size, blur, and contrast loss, supporting recognition at small sizes and various display conditions.

Evidence

Semantic and functional convergence scores are moderate (around 0.53 and 0.57 respectively), indicating the icon moderately conveys its intended meaning and function but may require some learned convention.

Evidence

Cultural convergence is low (0.31), reflecting limited shared recognition and cultural evidence for this specific symbol, which may reduce intuitive understanding across diverse user groups.

Evidence

Temporal convergence (0.57) suggests moderate persistence of meaning over time without significant semantic decay.

[ TRANSFER / METRIC CHART ]

Public evidence trend

The chart shows public evidence buckets by evidence year. Cohort breakpoints appear only when an aging referent is active.

Public evidence trend

Evidence year: 2026

Evaluation

Reference point.

X axis: Evidence year

Public evidence trend
Evidence year	Semantic Transparency	Cultural Evidence
1996	0.71	0.74
1997	0.28	0.74
1998	0.68	0.74
1999	0.72	0.74
2000	0.70	0.75
2001	0.28	0.74
2002	0.67	0.75
2003	0.67	0.75
2004	0.73	0.75
2005	0.68	0.75
2006	0.71	0.75
2007	0.70	0.75
2008	0.74	0.75
2009	0.28	0.75
2010	0.78	0.75
2011	0.68	0.75
2012	0.71	0.75
2013	0.28	0.75
2014	0.28	0.75
2015	0.28	0.75
2016	0.67	0.76
2017	0.67	0.76
2018	0.28	0.76
2019	0.28	0.76
2020	0.71	0.75
2021	0.28	0.75
2022	0.67	0.75
2023	0.28	0.24
2024	0.28	0.24
2025	0.28	0.24
2026	0.28	0.24

Cohort transfer is inactive for this published report. The chart above uses evidence-year or metric data instead.

asset source

Material Symbols railway_alert_2 SVG

Material Symbols by Google

Unofficial clarity analysis. PictoClarity is not affiliated with, endorsed by, or sponsored by Google. Material Symbols are provided by Google under their published license.

Open source

historical evidence