{"version":"1.0","type":"link","title":"Subgrade - Newikis","description":"In transport engineering, subgrade is the term used in the US for the native material underneath a constructed road, pavement or railway track (US: railroad track). In British English it is called formation level.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/d/d6/MortarlessPavement.jpg/1280px-MortarlessPavement.jpg","thumbnail_width":1280,"thumbnail_height":862}