As recently as 2008, Scania and Volvo were eyeing steam for powering trucks: http://www.nordicgreen.net/startups/article/ranotor-develop-steam-engine-powered-hy

As recently as 2008, Scania and Volvo were eyeing steam for powering trucks: http://www.nordicgreen.net/startups/article/ranotor-develop-steam-engine-powered-hybrid-trucks-together-scania-and-volv http://www.nordicgreen.net/startups/article/ranotor-develop-...