The thick ?spiderweb? of overhead cables needed to keep electrified light rail on the move is ugly, costly to maintain and requires a complex network of infrastructure and sub-stations. Now though, there?s a new development that could do away with overhead power lines and move everything safely onboard the tram. Supercapacitors are milk carton size devices that can store large amounts of energy, release it in fast bursts, and then recharge rapidly. It means a tram could arrive at a stop, be charged up with megawatts of power in a minute, then continue on its way. All without the need for overhead power lines. The CSIRO is working on a range of supercapacitor projects to do this with the Australian Government?s Rail Manufacturing Cooperative Research Centre and the China Railway Rolling Stock Corporation https://blog.csiro.au/supercapacitor-magic-making-tram-power-lines-disappear/