34 FAA Chart Users’ Guide - VFR Symbology - Sectional and Terminal Area Charts NAVIGATIONAL AND PROCEDURAL INFORMATION (Continued) Chart Limits Outline on Sectional of Terminal Area Chart TAC Outline of Special Chart on Sectional and Terminal Area  Chart Outline on Sectional of Inset Chart CULTURE Railroads Single Track Double Track More Than Two Tracks Electric Non-operating, Abandoned or  Under Construction  Roads Dual-Lane Divided Highway  Category 1 Primary Category 2 Secondary Category 2 Trails Category 3 Provides symbolization for  dismantled railroad when combined  with label “dismantled railroad.” Railroad Yards Limiting Track To Scale Location Only  Railroad Stations Railroad Sidings and Short Spurs Road Markers Interstate Route No.  U.S. Route No. Air Marked Identification Label  Road Names Roads Under Construction