Highway A4 (E40) runs from the east to the west of Poland. One part, which was built in years 2002-2003, goes through the Silesia Region which is strictly connected with mining activities. Many years of mining extraction have left a significant influence on the road usage. The most unique effect, which became a foundation of this article is a geological fault which crosses the highway near Katowice City. This article summarizes nearly 15 years of the highway existence at the fault, starting from designing process through execution stage, use stage up to renovation which was made in 2015. Great database illustrates step by step the propagation of fault and its influence on the road. The paper presents researches and designing negligence that has been made through many years, but also describes latest renovation solutions which were taken in 2015. The article focuses on the issues of very high tensile strength geosynthetic reinforcement structure and cyclic geodetic monitoring system which was made to ensure safety of highway users.
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