To cope with the problem of large trucks driving into tunnels that are two low, the city of Sydney in Australia have created a stop sign that’s impossible to miss. Much like the Japanese water clock in Osaka Station, a curtain of water has been created which then has the stop sign projected onto it. Designed by light show company Laservision, the sign is both obtrusive but perfectly harmless should the driver decide to carry on through. As 10 News report, Sydney was tired of the constant damages caused by the truck drivers, despite installing multiple signs, and did this as a last measure to prevent someone being killed.
Source: Huh Magazine