This contribution is based on the European collaborative project TRANSFORMERS (Configurable and adaptable trucks and trailers for optimal transport), which received co-funding from the European Commission. The project has the goal of reducing energy use per tonne.kilometre of goods transported by up to 25%. This is achieved by innovations including: i) Configurable whole vehicle aerodynamics, ii) Improved loading efficiency measures, iii) A distributed, trailer mounted electric driveline known as “hybrid-on-demand” for truck-semitrailer combinations. The combination of innovations gives the possibility of a semi-trailer combination which can be adapted or re-configured to suit individual transport missions. The paper focuses on providing background to the project, an overview of the innovations developed within the project, and the main conclusions that were drawn from the wide range of work undertaken within the project. It covers both the “Energy Efficiency” and the “Load Optimisation” trailers which were developed and tested within the project.