Japanese already tested it, with googly eyes. It seems to work. Modern cars are expensive, some extra plastic and servos is not going to break the bank. https:

Japanese already tested it, with googly eyes. It seems to work. Modern cars are expensive, some extra plastic and servos is not going to break the bank. https://dl.acm.org/doi/10.1145/3543174.3546841 https://dl.acm.org/doi/10.1145/3543174.3546841 https://www.dailymail.co.uk/sciencetech/article-11250965/Japanese-engineers-pair-googly-eyes-self-driving-car.html https://www.dailymail.co.uk/sciencetech/article-11250965/Jap... https://videos.dailymail.co.uk/video/mol/2022/09/26/5624499769514507507/640x360_MP4_5624499769514507507.mp4 https://videos.dailymail.co.uk/video/mol/2022/09/26/56244997... British used a LED matrix. More "output" options (frowns and smiles, text), similar results. https://www.nottingham.ac.uk/news/first-ever-uk-ghost-driver-study-using-visual-displays-to-communicate-with-pedestrians-completes-in-nottingham/ https://www.nottingham.ac.uk/news/first-ever-uk-ghost-driver... https://www.theengineer.co.uk/content/news/pedestrian-study-gauges-reactions-to-visual-prompts-on-ghost-driven-autonomous-car/ https://www.theengineer.co.uk/content/news/pedestrian-study-...