Variables

Categories

Estimated values

AADT

[41]

≤5500 vpd

>5500 vpd

1

2

Curve radius (m)

[42]

≤600

600 - 1500

>1500

3

2

1

Grade (%)

[36]

Negative,

Positive, or Zero

3

1

Segment length (m)

[43]

≤200

200-1000

≥1000

1

2

3