road diet
 n.— «When roads were actually closed, or their capacity severely reduced, 20 per cent to 60 per cent of the former traffic disappears entirely. It isn’t even siphoned off onto other roads. People just travel less. Some experts scoff, but cases of accidental or deliberate “road diets” prove the point.» —“Road Growth Not Always The Answer” by Rai Demopoulos London Free Press (Ontario, Can.) Apr.2, 2001. (source: Double-Tongued Dictionary)