In-vehicle nudging for increased Adaptive Cruise Control use: a field study
DOI: 10.1007/s12193-024-00434-z
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Summary
This field study investigates whether in-vehicle nudging interventions can increase driver utilization of Adaptive Cruise Control (ACC), an Advanced Driver Assistance System designed to maintain safe following distances and reduce rear-end crash risks. Despite ACC’s safety benefits, usage rates remain low due to habitual manual driving and lack of awareness. The research addresses the gap in understanding how behavioral interventions, specifically nudging and gamification, can encourage the adoption of such safety technologies without enforcing compliance. The study employed a within-group field trial design involving 49 Volvo XC60 drivers in Sweden. Participants were exposed to two sequential nudging applications installed on iPhones mounted in their vehicles. The first intervention (Treatment I) was an ambient design nudge that visually transformed chaotic dots into an ordered pattern as drivers used ACC, with a daily goal of 10 minutes. The second intervention (Treatment II) was a competitive leaderboard nudge that ranked participants based on weekly ACC usage, leveraging social comparison. Data on ACC activation and driving duration were collected automatically. Baseline usage was established before the interventions, followed by the ambient nudge, and finally the leaderboard nudge. Statistical analyses included paired t-tests and correlation tests to assess changes in ACC usage percentages relative to total trip time. The results demonstrated significant increases in ACC usage following the interventions. During the baseline period, average fleet ACC usage was 14.2%. Exposure to the ambient design nudge increased average usage to 20.8%, representing a 46% relative increase. When the competitive leaderboard nudge was introduced, average usage rose further to 22.9%, marking a 61% increase compared to baseline and an 112% increase compared to the ambient nudge phase. Individual responses varied considerably; drivers with lower baseline usage showed greater relative increases, indicating a negative correlation between initial usage and nudge effectiveness. Gender and age did not significantly influence baseline usage or the magnitude of behavioral change. The study concludes that in-vehicle nudging is a promising strategy for increasing the use of safety-critical vehicle functions. By subtly altering the choice architecture, nudges can effectively modify habitual driving behaviors without restricting driver autonomy. The findings suggest that social comparison mechanisms, such as leaderboards, may be particularly effective in sustaining engagement. However, the variability in individual responses highlights the need for adaptive systems that monitor behavioral outcomes and adjust interventions accordingly. This research provides empirical evidence supporting the integration of behavioral design principles into automotive human-machine interfaces to enhance traffic safety.
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-20 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-20 |
| chunk | success | chunk | — | — | 1 | 2026-06-20 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-20 |
| promote | success | — | — | — | 1 | 2026-06-20 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-20 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
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