Travelling light

摘要

For Daan Roosegaarde [pictured right), it was the frustration of being stuck in traffic on a major dual carriageway in the Netherlands that first sparked his curiosity about the role roads could play in harnessing energy. "I was sitting in my car and it hit me," he says of the moment four years ago. "Why do we talk about energy-efficient cars and invest billions into their research and development? Yet roads themselves are rarely ever considered."