Chapter 7 - At Grade Intersections

Chapter 7 Contents

7.1. Intersection Design Elements

7.2. Intersection Geometrics

7.2.1.     Angle of Intersection/Skew Angle

7.2.2.     Right-of-Way Flares

7.2.3.     Turn Lanes

7.2.4.     Islands   

7.2.5.     Intersection Radii

7.3. Median Openings

7.4. Driveways

7.5. Signalization

7.5.1.     New Intersections and Existing Unsignalized intersections

7.5.2.     Signal Modification

7.5.3.     Geometric Design Elements

7.6.  Roundabouts

7.6.1.     Advantages and Disadvantages of Roundabouts

7.6.2.     Signing and Pavement Marking

7.6.3.     Special Considerations

7.6.4.     Site Selection

7.7. Highway-Railroad Grade Crossings

7.7.1.     Horizontal Alignment

7.7.2.     Vertical Alignment

7.7.3.     Highway-Rail Grade Traffic Control Considerations       

7.7.4.     Traffic Control Devices

7.7.5.     Alternatives to Maintaining the Crossing

7.7.6.     Crossing Consolidation and New Crossings

7.7.7.     GDOT At-Grade Highway-Rail Crossing Evaluation Criteria

List of Tables

Table 7.1. Roundabout Advantages and Disadvantages