Roof profile
The roof profile represents a form of transverse slope in road and path construction. In this form, the transverse slope drops from the center outwards and thus forms a so-called roof slope . The roof profile developed from the grader profile and was initially used for both rural and urban roads. With increasing motorization and higher travel speeds, it was replaced by the desk profile , especially on extra-urban roads . In urban areas, on the other hand, the roof profile has proven its worth, as the speeds driven are lower and constrained points are often predetermined by peripheral buildings (such as property entrances or driveways). The roof profile is also chosen for wide road cross-sections (four or more lanes), as this allows the surface water to be drained off more quickly. On the other hand, the effort involved in building the roof profile is higher, since drainage facilities must be provided on both road edges .
The negative roof profile is a special form . In this case, the transverse slope does not run from the center outwards, but vice versa. The drainage system is thus in the middle. The negative roof profile is used, for example, on roads with slow traffic ( traffic-calmed areas ), footpaths or pedestrian zones.
literature
- Günter Wolf: Road planning . Werner Verlag, Munich 2005, ISBN 3-8041-5003-9 , pp. 181 .