The most important aspects of any statistical analysis are defining the questions and collecting data. Hence, to have a full experience of running your own study, the project requires you to define the topics and collect relevant data. Your main task is to perform inferential statistics analysis using some real-world data of your choice.
You should come out with a topic of interest to you, preferably related to the civil engineering disciplines such as structural, geotechnical, construction, materials, hydraulics, hydrology, environmental, transportation, project management, etc. However, if you’re unable to come out with a topic related to civil engineering, other Discipline may be acceptable, so long it is of interest to you instead of a vaguely crafted situation.
Good projects begin with very clear and well-defined hypotheses. You should think of questions that interest you first, then worry about how to collect and analyze data to address those questions. Generally, vague topics lead to uninteresting projects