These include additional lights and markings. The extent of the marking and lighting should be
directly related to the duration of the displacement as well as the type and level of aircraft activity.
These visual aids should be placed to provide an unobstructed Approach Departure Clearance
Surface with a 3 meter (10 foot) buffer between the surface and the tallest equipment in the
construction zone, and a 304.8 meter (1,000 foot) long overrun area on the departure end.