New Complex Solutions for the Real Time Spatial Road Design

The classical road design subdivided in plane, longitudinal and cross sections passes up some potentials for: maximizing of traffic safety parameters like sight distances and road surface drainage; optimization of integration in landscape by means of a digital terrain model (length, shape, earthworks); minimization of bridges and tunnels (number and dimensions); and minimization of the total costs (financial optimization). Only a consequent spatial design method with real time interaction allows the essential planning analysis. These are being realized by the new three-dimensional (3D) design applications of alignment, combined with active optimization. The active use of 3D design solutions is supplemented by the consequent use of 3D surveying models, which can contain not only surface and orthophoto-textures but also supply lines, soil layers, buildings, plants and many other essential features. Thus, the design gets possible in virtual reality. More flexibility is provided by the international use of new alignment elements like 3D-splines. These splines are narrowed to classical radii to keep them comparable and adaptable by genetic algorithms. All data are directly connected to the spatial guideline and are being permanently updated as cross sections, earthwork balance, bridges, tunnels, passive protection measures, ranges of vision and cost analysis divided into several levels of detail. This solution is the result of 2 years of development with a grant from the European Union. Some test projects were established on the basis of the prototype and successfully finished. The basic ideas and actual results of the research and development will be introduced to the road design experts.