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.
In general, a flashing yellow traffic light (dot) at an intersection means proceed with caution.. Traffic facing the yellow light has the right-of-way, but oncoming traffic usually also has a flashing yellow light, and cross traffic will have a flashing red light.