Artist and designer Daan Roosegaarde and producer Heijmans Infrastructure have debuted their test drive of Smart Highways, a sustainable road system for safer driving, on a highway in Oss in the Netherlands. Roosegaarde’s design put solar-powered Glowing Lines along the edge of highway N329, providing drivers with three edge strips of green light along their drive. During the day, the lines “charge up” with solar energy, and at night they can glow for up to eight hours, illuminating the route and keeping cars safely on the road.