GGU-SLOPE is based on the appendices of the supplementary technical regulations
The software program GGU-SLOPE is based on the appendices of the supplementary technical regulations and guidelines for the design of soundproof walls for highways (ZTV-Lsw 88) from the German Research Institute for Roads and Transportation Systems (FGSV): Design and Calculation of Bored Piles and Steel Posts for Soundproof Walls of Roads and Highways