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Destination (road design)

from Wikipedia, the free encyclopedia

Visibility model in the investigation of the holding visibility in the area of a crest

In road design, a target point is a spatial point to which the driver’s line of sight is directed (starting from the eye point).[1] It is an important parameter in planning and checking the visibility of roads. In Switzerland, this parameter is also called the end point.

The road construction guidelines define at what distance from the eye point and at what height the aiming point must be located above the carriageway. In Germany, for example, a target point height of either 0.50 metres (motorway) or 1.00 metres (outside motorways) above the carriageway applies.[2][3]

Norms and standards

Germany
  • Guidelines for the construction of rural roads (RAL)
  • Guidelines for the construction of motorways (RAA)
  • Notes on the visualisation of designs for extra-urban roads (H ViSt)
Austria
  • 03.05.11 Planning principles
  • 03.05.12 Plane-like nodes – intersections, T-intersections
Switzerland
  • SN 640 090b Project planning, basics; sight distances
  • SN 640 110 Line management; elements of vertical line management
  • SN 640 273a Knots; visibility

Individual references

  1. Notes on the visualisation of designs for extra-urban roads, FGSV-Verlag, page 8
  2. Guidelines for the construction of motorways, FGSV-Verlag, page 111
  3. Guidelines for the construction of rural roads, FGSV-Verlag, page 77