http://www.greencarreports.com/news/1109095_volvo-concept-truck-uses-hybrid-power-to-cut-fuel-use-emissionsThis is a report on Volvo Truck's Diesel Electric Hybrid Concept.
Not too detailed, but I liked this part:
The concept is also fitted with a hybrid-specific version of Volvo's I-See driver-assist system, which analyzes upcoming topography using GPS data and digital maps. Software determines the most efficient use of both the diesel engine and electric motor based on the terrain, as well as the optimal times for energy recovery, Volvo says.