The €3.5 mln was invested by the various partners in the research and development process, which has so far taken five years. The test route in Krommenie represents just a small part of this. We consciously opted for an initial pilot involving a short length of cycle path and yielding only a small amount of energy (enough to power around three households). This is enough to generate a wealth of practical information while keeping pilot costs down so that we can allocate a larger part of the available funds to developing SolaRoad into a marketable product.