The objectives of the research project are to: 1) Combine cooperativity and the eco-approach and departure (EAD) to reduce the negative effect of the increasing penetration rate. This could be accomplished by forming connected vehicle clusters so that the information of each vehicle could be shared among the group of vehicles. 2) Conduct field tests in existing connected vehicle testbeds and extend the scope to corridors or networks and study the energy optimization approach for multiple intersections.