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Project Development Information

Manuals, Guides and Policies

Standard Plans, Details and Specifications

The following standards and details are available in Microstation and/or Adobe Portable Document Format (PDF).
  • County Bridge Standards

    Standard bridge plans designed for use by local agencies.
  • Culvert Standards

    Standard culvert designs for use by the Iowa DOT and local agencies.
  • Electronic Reference Library

    The Iowa DOT Electronic Reference Library contains links to several items, including Standard Specifications, Supplemental Specifications, Materials I.M.s, Standard Road Plans, Standard Culvert Plans, Standard Bridge Plans, Construction Manual, Flaggers Handbook and SUDAS Standard Specifications.
  • Iowa DOT Design Manual

    This manual contains information on road design for the primary highway system, and is published by the Methods Section in the Office of Design.
  • Iowa Statewide Urban Design and Specifications (SUDAS)

    These design and specification manuals have been developed to provide a uniform set of design and specifications for use by any city or county government. These manuals are owned by the Iowa SUDAS Corporation, a non-profit organization composed of representatives from the Iowa DOT, cities, counties and design consultants. The manuals are maintained and published by the Center for Transportation Research and Education (CTRE).
  • Road Design Details

    Standard details, notes and tabulations.
  • Standard Road Plans

    Standard plans for highway and bridge projects.
  • Usage of Iowa DOT Standard Guardrail

    A list of standard road plans that are acceptable for use under different traffic volumes and/or speed zones.

Disadvantaged Business Enterprise and Targeted Small Business Information

  • Directory of Certified Disadvantaged Business Enterprises (DBE)

    A directory of DBE contractors, suppliers and consultants certified by the Iowa DOT. This publication is a helpful resource for determining a DBE goal or obtaining DBE participation in a federal-aid contract.
  • List of Certified Targeted Small Businesses

    This State of Iowa list is helpful for locating targeted small businesses (TSB) consultant or contracting firms as part of the TSB requirements for state-assisted contracts.
  • Targeted Small Business (TSB) Contract Provision

    This contract provision shall be included by the local public agency (LPA) in the bid and contract documents for all state-assisted, non-federal-aid contracts let by the LPA. These provisions are required by state law and the terms of the state-assisted funding agreement between a LPA and the Iowa DOT. This TSB contract provision also includes a copy of the Targeted Small Business (TSB) Pre-Bid Contact Information form, Form 730007, which shall be completed by the bidders on all state-assisted contracts let by the LPA.