In a world where cities are increasingly looking for eco-friendly solutions, Poland certainly seems to be on the right track. A brand new glow-in-the-dark cycle lane powered entirely by the sun has just been unveiled near Lidzbark Warminski in the north of the country.The technology, which was developed by engineering company TPA sp. z o.o, uses synthetic particles called "luminophores" to "charge" the asphalt with sunlight, before lighting up in a mesmerising blue colour when the sun goes down.The project is inspired by Daan Roosegaarde's "Starry Night" but, unlike the Dutch project, which uses LEDs, it is completely powered by energy from the sun.A similar concept went on trial in the UK in 2013 when Cambridge Council enlisted technology company Pro-Teq Surfacing to create a "Starpath".Earlier this year, another colourful cycle path - located a little further south - also drew attention; the striking "Light Path" in Auckland, New Zealand was designed to attract more residents to urban cycling with its striking pink stylings.For now, the cycle lane is in the testing phase, but the company behind it hopes the technology could be rolled out on a larger scale. The concept ought to be attractive for local authorities, both for its environmental credentials and money-saving potential. ..