Assessing the Effect of Typography on In-Vehicle Glance-Like Reading Across the Lifespan

Reimer, Bryan; Dobres, Jonathan · 2017 · ROSA P / New England University Transportation Center

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Summary

This report summarizes research conducted by the New England University Transportation Center, led by Bryan Reimer and Jonathan Dobres at MIT, regarding the impact of typography on in-vehicle glance-like reading. The study addresses the critical need for readable visual user interfaces in driving contexts, where rapid identification of information is essential for safety and minimizing distraction. Previous research indicated that typeface design significantly influences driver behavior, including task completion time and error rates. This project expanded upon earlier findings by examining how legibility is affected by font weight, rendering systems, illumination, contrast polarity, letter size, and driver age, as well as comparing specific highway signage fonts. The research comprised four distinct studies published between 2016 and 2017. The first study investigated the legibility of four typeface weights under optimal and suboptimal rendering conditions. The second study utilized a lexical decision paradigm to measure legibility thresholds across two type sizes, display polarities (positive vs. negative), and ambient illuminations (near-dark and daylight-like). The third study examined age-related differences in legibility by having participants discriminate words from non-words using stimuli that simulated decreased visual acuity and neural detuning. The fourth study assessed the legibility of Highway Gothic and Clearview signage fonts using psychophysical techniques to determine the time required for accurate word identification under various contrast conditions. Key findings revealed that rendering quality significantly impacts font weight legibility; under suboptimal rendering, light typefaces showed degraded legibility, whereas under optimal rendering, lighter weights demonstrated enhanced legibility compared to heavier ones. Regarding display polarity, the research confirmed a "positive polarity advantage," where black-on-white text was more legible than white-on-black, particularly under dark ambient illumination. This advantage was attributed to pupillary contraction caused by brighter illumination, which reduces optical aberrations. In the context of aging, the study identified that older adults experience diminished capacity to perceive text due to visual system changes, even with acuity correction. Finally, the comparison of signage fonts showed that Clearview had lower legibility thresholds than Highway Gothic across all conditions, indicating superior legibility, although thresholds increased significantly with age. The significance of this work lies in its implications for the design of automotive human-machine interfaces and roadway infrastructure. The findings suggest that designers must account for rendering capabilities, ambient lighting conditions, and the visual limitations of older drivers. Specifically, the results support the use of positive polarity displays in low-light conditions and highlight the superior legibility of the Clearview font for highway signage. These insights provide empirical evidence for optimizing interfaces to ensure safety and usability across the lifespan, particularly as the driving population ages.

Key finding

Clearview signage produced lower legibility thresholds than Highway Gothic across all tested conditions, indicating superior glance-based legibility.

Methodology

lab_experiment

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via bulk_ingest_rosap on 2026-05-23 (7 acquisition events logged).

Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.

Topics

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• sign visibility legibility