Available power level, computing capacity and node degree I think.

density of vehicles between the junctions, their connectivity, gaps, link quality between two nodes, etc.

The parameters are based on your idea and scenario such as urban or highway. Secondly, for urban environment the parameters are related to traffic such as density, street maps, vehicle direction, velocity, junctions, radio range, link quality. 

I think, you will discuss your idea first, then on the basis of your idea I will suggest parameters to you. Hope this answer help you for further process.