2. Source: A Policy on Geometric Design of Highways and Streets (The Green Book). Washington, DC. American Association of State Highway and Transportation Officials, 2001 4 th Ed.
3. Source: A Policy on Geometric Design of Highways and Streets (The Green Book). Washington, DC. American Association of State Highway and Transportation Officials, 2001 4 th Ed.
6. Maximum Relative Gradiant (G) Source: A Policy on Geometric Design of Highways and Streets (The Green Book). Washington, DC. American Association of State Highway and Transportation Officials, 2001 4 th Ed.
7. Source: Iowa DOT Standard Road Plans RP-2 With Spirals Same as point E of GB
8. Source: Iowa DOT Standard Road Plans RP-2 With Spirals Tangent runout (A to B)
9. Source: Iowa DOT Standard Road Plans RP-2 With Spirals Removal of crown
10. Source: Iowa DOT Standard Road Plans RP-2 With Spirals Transition of superelevation Fully superelevated