Settlement- and heave-related movements of bridge approach slabs relative to bridge decks create a bump in the roadway causing inconvenience to the travelling public and at times so large as to make travelling unsafe. Hence, it is important to adopt suitable remedial methods to mitigate the approach settlements in order to ensure safe traveling conditions and also reduce repair/maintenance costs. This paper presents the use of a lightweight fill material, Expanded Clay Shale (ECS) material as an embankment fill. Laboratory studies on fill material, field instrumentation and monitoring, and numerical analyses are performed and these results are discussed here. Test results show that the ECS embankment system experienced lesser settlements than the conventional embankment fills. Numerical modeling also provided settlement predictions that are closely matched with the field measurements. In conclusion, design charts are introduced for the construction of light weight fill embankments using Expanded Clay and Shale material.