Chapter 6 - Cross Section Elements

6.5. Curbs – Outside Shoulders

6.5.1. Outside Curb Location Relative to Travel Lanes, Guardrail, etc.

For a typical roadway section with curb and gutter, the curb is offset from the through travel lane as shown in Chapter 5. of the AASHTO Roadside Design Guide (2006). When used to delineate raised islands, like those commonly placed at Intersections, the curb should be offset from the travel lane as discussed in Section 6.5.5. of this Manual. Additional discussion on the location of curbs is provided in Chapters 4 and 9 of the AASHTO Green Book (2004).

The relationship of curb-to-guardrail is critical. If the curb is not properly located, the guardrail will not function as intended. Chapter 5 of the AASHTO Roadside Design Guide (2006) discusses the location of curb with respect to the face of the guardrail. For additional information, refer to GDOT Construction Standards and Details, Ga. Std. 4280.