Profile Drawing
Starts of curves and areas of obstructed vision
Determining standard spatial elements (SSE)
Route Simulation
The steps for such checks are very simple. All the necessary proofs required by the safety audit are provided by CARD/1 at each stage of design using sight distance analysis and route simulation.
The results of stopping sight distances, overtaking sight distances or even the start of curves or areas of obstructed vision are all in line with the requirements stipulated by the German Visualisation Guidelines for road planning in non-built-up areas (H ViSt). The results can all be displayed in the sight distances string and output in the profile.
CARD/1 provides section strings with standard spatial elements (SSE) and both permitted and, equally important, non-permitted deviations. Standard spatial elements are created whenever a curve’s start and end in the base map coincide with those of the vertical curve of the associated vertical alignment. Small, radius-dependent shifts are permitted.
Concealed starts of curves and critical areas of obstructed vision are always automatically calculated and displayed in the sight distance string. Once any necessary corrections have been made to the design, the sight distance string can be output in the profile.
In the profile drawing, the sight distance strings for the outward and return journeys are now separate. This means that any areas of obstructed vision or concealed starts of curves are now clearly marked as required by H ViSt.
The route simulation is an excellent way to gain a realistic impression of the newly-planned road. Here you will find both the areas of obstructed vision and the concealed starts of curves displayed at each chainage.
