Railway Projects for Transportation Engineering Students

Hi, i am a student studying in railway engineering field. I need ideas for a project that involves element of design and analysis. It has to be railway industrial relevant. Please share you ideas  ? 

Railways own a huge area of land open to sky. If the track is covered with solar PV canopy,  there is potential to harvest a huge amount of solar power, which can be used to run the trains.

Maybe this can be investigated.

https://www.theguardian.com/sustainable-business/2017/feb/15/solar-powered-trains-uk-india-renewables-tracks-electric

Can you also work on something which will identify any faulty rail ,and notifying the near by stations so that we can avoid accidents.