Traffic control can be regarded as a multiagent application in which car-agents and traffic-light-agents need to coordinate with each other to optimize the traffic flow and to avoid congestions. Environment ions naturally suit this scenario in that agents actions are mainly driven by traffic-related information that are distributed across the environment both at a practical and conceptual level. In this context we present traffic-control mechanisms on the basis of our Co-Fields model and discuss some experimental results we obtained in simulations that validate our proposal.