Airport Accessibility and Navigation Assistance for People with Visual Impairments
João Guerreiro, Dragan Ahmetovic, Daisuke Sato, Kris Kitani, Chieko Asakawa · 2019 · Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems · doi:10.1145/3290605.3300246
Summary
This paper investigates whether a BLE-beacon-based smartphone navigation system can enable visually impaired travelers to move through an airport independently — a setting where they are currently required to rely on airline-provided sighted escorts to reach the gate, and where they often end up stranded there for hours once the escort leaves. The work has two parts. First, two focus groups with nine visually impaired participants surfaced the lived texture of air travel: participants described airports as uniquely hostile (large open spaces that defeat wayfinding, crowds that move unpredictably, escalators and moving walkways that introduce hazards), recounted demeaning experiences (being placed in unwanted wheelchairs), and reported a near-universal loss of independence — 'I kinda give up my right to be independent... because it is so difficult.' Second, the authors installed 350 iBeacons covering 33,000 m² of Pittsburgh International Airport and adapted the open-source NavCog app with two airport-specific extensions: veering detection with 'bear left/right' corrections tuned to localization confidence, and a heuristic for handling moving walkways (where the pedestrian motion model breaks because the user isn't actually walking). Ten blind/low-vision participants (mixing guide-dog users, white-cane users, and one unaided walker) then navigated four realistic routes: entrance-to-ticketing, train-to-gate, gate-to-restroom, and gate-to-restaurant — without a sighted guide.
Key findings
All ten participants completed all four routes; six completed the entire study with zero navigation errors. Average localization error was 2.2 m (4.5 m at 95th percentile). Route completion times were practical: the gate-to-restroom route (~30–40 m) took under a minute on average; gate-to-restaurant (~230 m) took roughly 4 minutes; the longest train-to-gate route (~310 m through escalators, open spaces, and a moving walkway) took about 6 minutes. Average walking speed was 0.86 m/s (1.01 m/s for guide-dog users, 0.73 m/s for cane users). Veering was common in wide corridors and open areas but was usually self-corrected or corrected by the system's 'bear left/right' instructions. The most problematic spot was the escalator: guide dogs were confused by it (one user had to stop to retrain the dog mid-task), and white-cane users could overshoot it. Subjective scores rose sharply: confidence in independent airport navigation climbed from 3.0 (without the app) to 6.89 / 7 (with it, p=.0003); perceived difficulty in crowded areas dropped from 5.44 to 4.0 (p=.04); all participants gave the maximum score for willingness to reuse the system on the shorter gate-area routes.
Relevance
Air travel is a flashpoint for the tension between compliance-based accessibility (federally mandated escort services) and lived autonomy (the ability to get up and find a restroom or buy a coffee during a five-hour layover). This study is the first systematic real-world evaluation of indoor BLE navigation in an airport with visually impaired travelers, and it shows the approach works well enough for practical deployment — completion rates were essentially 100%, and the infrastructure (BLE beacons) is already present in many airports for non-accessibility uses like retail promotions. For practitioners and policy advocates, the headline is that the technical barrier to independent airport navigation has largely fallen; what remains is institutional (airport partnerships, app maintenance, awareness among VI travelers). Limitations include the small, single-airport sample, the open question of how low-vision users fare relative to totally blind users, and unresolved safety edge cases around escalators and narrow paths near fragile displays where sub-meter accuracy would matter. The paper pairs well with organizational accessibility work on airline staff training and wheelchair-default assumptions.
Tags: airport accessibility · blind navigation · indoor navigation · orientation and mobility · visual impairment · blindness · assistive technology · Bluetooth Low Energy · beacons · wayfinding · mobile accessibility · independent travel
Standards referenced: Airport Disability Compliance Program · FAA AC 150/5360-14A