Track-work machine (IMAGE) Graz University of Technology Caption Track construction work requires track-work machines - and these are currently largely diesel-powered. TU Graz investigated fossil-free drive alternatives for the special construction machines. Credit Lunghammer - TU Graz Usage Restrictions none when stating the source "Lunghammer - TU Graz" License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.