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.
Give way to traffic on a major road - can also be used at a mini roundabout. Give way to traffic from the right at a roundabout. Stop line for pedestrians at a level crossing. A broken white line marks the centre of the road. Longer broken white lines in the centre of the road indicate a hazard ahead. Never cross a hazard warning line unless you are certain it is safe.