The federally mandated 55 MPH speed limit failed at every goal, but still too; many decades to replace.
The federally mandated 55 MPH speed limit failed at every goal. It saved 1/4th the oil promised ($350M), but it cost $3.65B in enforcement. We went from 70% speed limits compliance to 90% non-compliance. Accidents and fatalities were flat, but declined when we raised speed limits later. Bitter legal/constitutional fights wasted $ millions and decades of court time.
