2024 He secretly changed this freeway sign, helped millions of drivers [video] (69 points, 31 comments) https://news.ycombinator.com/item?id=40972851

2021 Guerrilla artist faked downtown LA freeway sign in 2001 (167 points, 55 comments) https://news.ycombinator.com/item?id=28223788

2020 Guerrilla Public Service Redux (2017) (421 points, 110 comments) https://news.ycombinator.com/item?id=23325319

2010 The Fake Freeway Sign that Became a Real Public Service (140 points, 41 comments) https://news.ycombinator.com/item?id=1047054