the length of roadway ahead that is visible to the motorist.
The distance along a railroad track from which a train might be seen by a highway user.
The distance measured along the carriageway over which objects of defined height are visible to a driver.
The visual distance required for a drive to safely operate his/her vehicle/bike as required by the roadway design.
The length of road ahead that is visible to a driver.
A measurement of the user's visibility, unobstructed by objects, along the normal travel path to the furthest point of the roadway surface.
