For example, a draft proposal from Germany's National Platform on the Future of Mobility task force recommended a blanket 130 km/h (81 mph) speed limit across the Autobahn to curb fuel consumption and carbon emissions.[8] Some cities have reduced limits to as little as 30 km/h (19 mph) for both safety and efficiency reasons.[9] However, some research indicates that changes in the speed limit may not always alter average vehicle speed.[10]