Innovations for the improvement, renovation and maintenance of secondary road networks are reviewed: new types of road construction materials based on industrial by-products, different types of applications and structures for the new materials, new types of methods for the mixing of the materials and in-detail controlled construction processes to ascertain the target quality and economic benefits of the renovation. The project has demonstrated the innovations by pilot-scale construction. A long-term follow-up of the performance of the construction will finally show the real performance of the pilot application. However, already the short term experience and results indicate that the environmentally friendly and sustainable construction systems produce significant benefits for the society.