Updated for the April 2021 letting.

The design details contained in this manual (commonly referred to as the "Green Book") have been developed to aid the designer in the development of detailed design plans for interstate and primary road construction in the state of Iowa. These details are not intended to cover all design situations. Where specific design problems require special solutions, the typical sections and design forms may be modified. Refer to Section 1E-4 of the Design Manual for guidelines for modifying Road Design Details.

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Typical Components Index Excel Icon    
Revision packet (April update)   PDF file DGN file
Revision packet (October update)   PDF file DGN file
Recently published   PDF file  

Renumbered Standard Road Plans and Design Details

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  Book Sections
100s Design and Tabulation Forms
200s Standard Notations
500s Design Detail Sheets
  Typical Components
  Grading Typicals
  Detour Typicals
2000s Roadway Typical Sections and Drawings
4000s Roadway Ditches
6000s Curbs
7000s Paving and Reconstruction
8000s Median Crossings, Guardrail, Barriers and Earthwork
9000s Pavement Markings