Cross Section (Crown) Roadside Drainage

Cross Section (Crown)

Numerical Verbal Description Rating Rating No restriction to water flow from centerline to ditch; Little or no 3 Good ponding on the road surface; Cross slope 3% or more; Superelevations as needed; good 'rooftop' shape.

Occasional restriction of water flow from centerline to ditches; Occasional ponding, particularly near the centerline; Cross slope 1% 2 Fair to 3%; Some instances of inadequate superelevations; Occasional longitudinal erosion due to inadequate crown; Some flattening of the crown, especially at the centerline.

Water does not flow from the road surface to the shoulders; Cross slope less than 1% or inverted; Generally inadequate superelevations; 1 Poor Longitudinal erosion due to lack of crown; Frequent ponding on the road surface.

NOTE: Description in italics is from the PASER Gravel manual

Roadside Drainage

Numerical Verbal Rating Rating Description Roadway above the surrounding terrain; Good foreslopes, ditches 3 Good and culverts that quickly carry water away from the road surface.

Roadway near the grade of the surrounding terrain; Marginal foreslopes, ditches and culverts; Secondary ditches; Occasional 2 Fair transverse erosion due to roadside drainage not carrying water away from the road surface.

Roadway at or below the grade of the surrounding terrain; Few or no 1 Poor ditches; Runoff is forced onto the road surface, causing transverse and longitudinal erosion.

NOTE: The descriptions above typify roads with this quality drainage. Not all flaws will be apparent in every road in each category.

2/12/2014 WTTC GH GRRS v 1.4 1 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 1 Poor: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 2 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 1 Poor: Roadside Drainage

1 Poor: Cross Section 1 Poor: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 3 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 1 Poor: Roadside Drainage

1 Poor: Cross Section 1 Poor: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 4 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 2 Fair: Roadside Drainage 1 Poor: Cross Section 2 Fair: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 5 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 2 Fair: Roadside Drainage

1 Poor: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 6 Cross Section (Crown) & Roadside Drainage

1 Poor: Cross Section 3 Good: Roadside Drainage

1 Poor: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 7 Cross Section (Crown) & Roadside Drainage

2 Fair: Cross Section 1 Poor: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 8 Cross Section (Crown) & Roadside Drainage

2 Fair: Cross Section 2 Fair: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 9 Cross Section (Crown) & Roadside Drainage

2 Fair: Cross Section 2 Fair: Roadside Drainage

2 Fair: Cross Section 3 Good: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 10 Cross Section (Crown) & Roadside Drainage

2 Fair: Cross Section 3 Good: Roadside Drainage

2 Fair: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 11 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 1 Poor: Roadside Drainage

3 Good: Cross Section 1 Poor: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 12 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 1 Poor: Roadside Drainage

3 Good: Cross Section 1 Poor: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 13 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 1 Poor: Roadside Drainage

3 Good: Cross Section 2 Fair: Roadside Drainage

2/12/2014 WTTC GH GRRS v 1.4 14 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 2 Fair: Roadside Drainage

3 Good: Cross Section 2 Fair: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 15 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 16 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 17 Cross Section (Crown) & Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage

3 Good: Cross Section 3 Good: Roadside Drainage 2/12/2014 WTTC GH GRRS v 1.4 18