Glow-in-the-dark materials are no longer for toys. Photoluminescence can help cities feel safer at night, whether it’s part of a mural, a bike lane, or a highway. Glow-in-the-dark paths have been tested in several European cities (the above is a Van Gogh-inspired bike path by the Dutch artist Daan Roosegaarde) and in Texas, but now, the technology may be coming to Singapore. The city-state is currently developing a 15-mile greenway called the Rail Corridor, and it now has a glow-in-the-dark path, as Mashable reports.
The 328-foot stretch of glowing path is part of a test of multiple surface materials that might eventually be used throughout the park, depending on public opinion. In addition to the strontium aluminate-beaded path that glows at night, there are also three other 328-foot stretches of the path that are paved with fine gravel, cement aggregate, and part-grass/part-gravel. The glow-in-the-dark material embedded in the walkway absorbs UV light from the sun during the day and can emit light for up to eight hours once the sun goes down.
However, in practice, glow-in-the-dark paths can be less dazzling than they seem. Mashable’s reporter called the glowing effect on Singapore’s path “disappointingly feeble.” In 2014, a glowing highway-markings pilot by Studio Roosegaarde in the Netherlands revealed that the first road markings faded after exposure to heavy rains. When it comes to glowing roads, the renderings tend to look better than the actual result, and there are still kinks to work out. (The studio worked the issue out eventually.) While a person walking or biking down Singapore’s glowing path might be able to tell that they were staying on the path better than if they were fumbling along dark pavement, it’s not the equivalent of a streetlight, for sure.
The trial paths opened to the public on July 12. The government is still gathering survey responses on people’s reactions to the different surfaces to determine how to proceed with the rest of the development. If the glow-in-the-dark path proves popular with visitors, the material could eventually spread to all the paths throughout the Rail Corridor. You can see what the glowing path looks like in action in the video below from The Straits Times.