Environmentalists and safety advocates have recently been pushing to implement speed limits throughout the autobahn system of no more than 130 km/h (approx. 80 mph). German Chancellor Angela Merkel has put the kibosh on those plans for the time being. While those pushing for the changes argue that the lower speeds would help reduce greenhouse gas emissions, Merkel feels the increased traffic jams would counter any such benefit. Instead Merkel prefers improved traffic management systems which would improve the flow of vehicles.