User requirement analysis for a railway ticketing portal with emphasis on semantic accessibility for older users
Michael Leitner, Özge Subasi, Norman Höller, Arjan Geven, Manfred Tscheligi · 2009 · Proceedings of the 2009 International Cross-Disciplinary Conference on Web Accessibility (W4A) · doi:10.1145/1535654.1535683
Summary
This paper investigates the user requirements of older adults using an online railway ticketing portal operated by a nationwide Austrian railway company. The researchers employed a mixed-methods approach combining a large-scale online questionnaire (1,200 valid responses), semi-structured interviews with 20 older adults at a main railway station, and a focus group of 14 experienced older internet users. The study was motivated by the recognition that traditional web accessibility guidelines focus primarily on technical (syntactic) accessibility for specific disability groups such as screen reader users, while neglecting the broader semantic and procedural accessibility needs of older adults. The authors distinguish between three types of accessibility: syntactic accessibility (coding sent to the browser), semantic accessibility (predictable behavior and consistent placement of elements), and procedural accessibility (consistent sequencing of events and interaction patterns). Their research sought to identify specific barriers older users face when purchasing tickets online and to suggest improvements aligned with these users' actual needs rather than assumptions based solely on age. The paper situates itself within the "Accessibility 2.0" framework proposed by Kelly et al., which advocates moving from centralized, single-solution approaches to flexible, user-centered, context-aware accessibility practices.
Key findings
The questionnaire revealed that older adults who buy tickets online value the ease and comfort of the process significantly more than younger users, while those who avoid online purchasing cite complexity and discomfort as primary barriers. Crucially, older users' attitudes toward the internet correlate more strongly with their experience level than with their age alone. Contrary to common assumptions, advertisements and interactive elements are not universally perceived as negative by older users — contextually relevant, tailored information (such as destination-related offers) is actually welcomed as useful content rather than unwanted promotion. The information hierarchy analysis showed that ticket price and type are the most important factors for all users, with accessibility information ranked near the bottom by both age groups. Interviews confirmed that older adults prefer counter purchases for unfamiliar or complex ticket types but find online purchasing comfortable for routine, well-known routes. Focus group participants emphasized the need for clear process guidance, end-of-transaction summaries, and consistent navigation naming. The study mapped common problems reported by older adults to specific WCAG 2.0 guidelines, identifying gaps in areas like context-aware input assistance (Guideline 3.3), error prevention (Guideline 3.3.4), readability (Guideline 3.1), and navigability (Guideline 2.4).
Relevance
This research highlights an important gap in accessibility practice: the distinction between technical compliance and meaningful usability for diverse populations. While WCAG conformance addresses many syntactic barriers, older adults face semantic and procedural challenges — unpredictable layouts, inconsistent interaction patterns, and unclear process flows — that standards alone do not resolve. The concept of semantic accessibility introduced here remains highly relevant as web applications grow more complex. For practitioners, the study offers concrete design guidance: provide clear step-by-step process indicators, offer contextually relevant information rather than generic advertisements, use consistent naming and placement of navigation elements, and include transaction summaries before final confirmation. The finding that experience matters more than age challenges the tendency to treat older adults as a homogeneous group and argues for user research that segments by digital literacy rather than demographics alone. The paper's mapping of user-reported problems to WCAG guidelines provides a useful template for connecting user research findings to standards-based remediation.
Tags: older adults · semantic accessibility · user requirements · universal accessibility · e-commerce accessibility · user-centered design · web accessibility
Standards referenced: WCAG 2.0