road diet
 n.— «The concept of dropping lanes to improve pedestrian safety, which also tends to benefit street-side businesses, is known as a road diet. Most roads are put on diets when their traffic counts approach 12,000 cars a day,» —“Why did the shopper cross the road?” by Jessica Vanegeren Post and Courier (Charleston, S.C.) Nov. 13, 2004. (source: Double-Tongued Dictionary)