Silt. Silt is granular material of a size somewhere between sand and clay whose mineral origin is quartz and feldspar. Silt may occur as a soil or as suspended sediment in a surface water body. It may also exist as soil deposited at the bottom of a water body.
In North America, a grade-separated junction may be referred to as a grade separation or as an interchange â in contrast with an intersection, at-grade, a diamond crossing or a level crossing, which are not grade-separated. 1 Effects.
Gaps - Breaks in the traffic stream long enough to permit vehicles or pedestrians access across or into the traffic stream. Gore - The V-shaped area that separates through-traffic from exiting or entering traffic on freeways and highways. Grade Separation - A crossing that uses an underpass or overpass to eliminate conflict points.