Chapter 6 - Cross Section Elements

6.5. Curbs – Outside Shoulders

6.5.2. Curb Types

Sloped Curbs or Barrier Curbs

Curb shapes are generally classified as either sloped or barrier curbs. The sloped curb has a flat sloping face. The barrier curb is characteristic of a steep face.

Generally, barrier curb is only used when sidewalks are provided and in the curb return of turnouts to intersecting streets. See Table 6.7 for proper use of curb.

Concrete or Asphaltic Curbs

Portland cement concrete is used for most curbs. Asphaltic curbs are limited primarily to header curbs in parking areas. Asphaltic curbs are also used to control runoff and erosion on high fills (>20-ft.) with 2:1 side slopes or in guardrail sections along rural roadways. See GDOT Construction Standards and Details, Construction Detail S-4 for information regarding the placement of asphaltic curbs behind guardrail.