Office of Design

Chapter 1 — General Information  

1A

Introduction

 
  1A-1...................About This Manuals

1B

General

 
  1B-1..................Glossary and Abbreviations  
  1B-2...................Contact Information  
  1B-4...................Densities for Use in Estimating Quantities
  1B-5...................Concrete Pipe Thickness Tables  
  1B-6...................Project Cost Estimates  
  1B-7...................Managing Changes in Project Concepts

1C

Standards and Design Criteria

 
  1C-1...................Selecting Design Criteria
  1C-7...................Public Interest Findings
  1C-8...................Documenting Design Decisions

1D

Plan Development

 
  1D-1...................Project Flow Chart
  1D-3...................Preliminary Survey Procedure
  1D-4...................Pavement Determination Process
  1D-7...................Interchange Review
  1D-8...................Access Review Submittal
  1D-9...................Field Examination Checklist (New and Reconstructed Highways)
  1D-10.................Field Examination Checklist (3R and 4R Projects)
  1D-14.................Lighting Warrants Request
  1D-15.................Design Public Meeting Displays
  1D-20.................Reviewing Railroad Crossings at Side Roads

1E

Plan Preparation

 
  1E-1....................Certification of Plans
  1E-3....................Plan Revisions
  1E-4....................Road Design Details
  1E-5....................Standard Road Plans
  1E-6....................Designer Information for Standard Road Plans
  1E-7....................Designer Information for Road Design Details
  1E-8....................Plan Submittals for County Review
  1E-9....................Standard Notes

1F

Plan Sheets

 
  1F-1....................Plan Sheets – General Information
  1F-2....................A Sheets
       1F-2a..................Title Sheet
       1F-2b..................Location Map Sheets
       1F-2c..................Plan Revision Sheets
  1F-3....................B Sheets
       1F-3a..................Typical Cross Sections
  1F-4....................C Sheets
       1F-4a..................Project Description Tabulation
      1F-4.5..................CS Sheets
  1F-5....................D Sheets
       1F-5a..................Plan and Profile Legend and Symbol Information Sheet
       1F-5b..................Plan and Profile Sheets
  1F-6.....................E Sheets
  1F-7.....................F Sheets
  1F-8.....................G Sheets
  1F-9.....................H Sheets and HE Sheets
  1F-10...................J Sheets
  1F-11...................K Sheets
  1F-12...................L Sheets
       1F-12b...........Intersection Layout Sheets
  1F-13...................M Sheets
  1F-13.5..............MIT Sheets
  1F-14...................N Sheets
  1F-15...................P Sheets
  1F-16...................Q Sheets
  1F-17...................R Sheets
  1F-18...................S Sheets
  1F-19...................SPS Sheets
  1F-20...................T Sheets
  1F-21...................U Sheets
  1F-22...................V Sheets
  1F-23...................W, X, and Y Sheets
       1F-23a............Cross Section Spacing and Sheet Dimensions
  1F-24...................Z Sheets

1G

Bid Item Information

 
  1G-1...................Bid Item Determination and Quantity Estimation
  1G-4...................Bidding Mobilizations for Watering
  1G-5...................Bidding Mobilizations for Erosion Control
  1G-6...................Salvaged Materials
  1G-7...................Monitoring with Incident Response
  1G-8...................Items Left in Place between Projects
  1G-10.................Bidding Alternate Items

1H

Final Plan Preparations

 
  1H-1...................Plan Turn-In
  1H-2...................Changes After Plan Turn-In
  1H-3...................Communication with Contractors and Field Staff
Chapter 2 — Alignments  

2A

Horizontal Alignment

 
  2A-1...................Horizontal Alignment
  2A-2...................Superelevation
  2A-3...................Superelevation Tables
  2A-4...................Superelevation Transition Considerations for Pavement Drainage

2B

Vertical Curves

 
  2B-1...................Vertical Alignment

2C

Spiral Curves

 
  2C-1...................Spiral Curve Design

2D

Reverse Curves

 
  2D-1...................Reverse Curve Design
Chapter 3 — Cross Sections  

3A

Roadways

 
  3A-1...................Typical Roadway Sections

3C

Shoulders and Curbs

 
  3C-2...................Curbs
  3C-3...................Shoulder Cross Slope
  3C-3.5................Shoulder Design Changes
  3C-4...................Shoulder Design
  3C-5...................Milled Rumble Strips
  3C-6...................Safety Edge

3D

Subgrade and Subbase

 
  3D-1...................Subgrade Slopes
  3D-2...................Grading on Multi-Year Four Lane Divided Roadway Projects
  3D-3...................Pavement Drainage and Strength Layers

3E

Medians

 
  3E-1....................Medians
  3E-2....................Median Crossings
  3E-3....................Temporary Median Crossovers

3F

Foreslopes

 
  3F-2....................Foreslopes at Drainage Structures
  3F-3....................Transverse Slope Adjustment at Entrances and Safety Ramps

3G

Ditches

 
  3G-1...................Roadway Ditches
  3G-2...................Intercepting Ditches

3J

Berms and Benches

 
  3J-1.....................Berms and Benches

3K

Access Points

 
  3K-2...................Entrance Design
Chapter 4 — Drainage  

4A

Urban Drainage Design

 
  4A-1...................Introduction to Stormwater Drainage System Design
  4A-2...................Stormwater Drainage System Information Sources, Documentation, and Permitting
  4A-3...................Effects of Roadway Geometrics On Pavement Drainage
  4A-4...................Concept Plan
  4A-5....................Using the Rational Method to Determine Peak Flow
  4A-6...................Calculating Spread and Checking Intake Location
  4A-7...................Open-throat Curb Intakes
  4A-8...................Barrier Grate Intakes
  4A-10.................Storm Sewer Design
  4A-11.................Cost Estimates and City Agreements
  4A-12.................Removing or Abandoning Storm or Sanitary Sewer
  4A-13.................Removing Intakes or Manholes
  4A-50.................Introduction to Geopak Drainage
  4A-51.................Creating a Survey Report
  4A-52.................Starting a GEOPAK Drainage Project
  4A-53.................GEOPAK Drainage-Structures
  4A-54.................GEOPAK Drainage Area
  4A-55.................Geopak Drainage – Pipes
  4A-56.................Geopak Drainage – Networks
  4A-57.................Geopak Drainage – Pipe Profiles
  4A-58.................Geopak Drainage – Drainage Reports

4B

Rural Drainage Design

 
  4B-1...................Determining Entrance and Safety Ramp Pipe Culvert Lengths
  4B-2...................Livestock Passes
  4B-3...................Removing or Abandoning Culverts

4C

Miscellaneous

 
  4C-1...................Subdrains
  4C-2...................Bridge End Drains for Capturing Stormwater Runoff
Chapter 5 — Earthwork  

5A

General

 
  5A-1...................Earthwork Flowchart
  5A-2...................Earthwork Essentials
  5A-3...................Earthwork Deliverables for Plan Turn-in

5B

Excavation and Borrow

 
  5B-1...................Rock Excavation
  5B-2...................Culvert Excavation and Backfill
  5B-3...................Bidding Contractor Furnished Borrow

5C

Earthwork Quantities

 
  5C-11...................Roadway Earthwork Bid Item Descriptions
Chapter 6 — Geometric Design  

6A

Geometric Design of Intersections

 
  6A-1...................Horizontal Intersection Design: Rural Two-Lane  
  6A-2...................Intersection Design Vehicle
  6A-3...................Modern Roundabouts-General Guidance
       6A-3a.................Roundabout Feasibility Initial Screening Tool
  6A-7...................Rumble Strips at Intersections
  6A-8...................Intersection Alignment (Rural Primary Highways)
  6A-9...................Edge Profiles
  6A-10...................Intersection Edge of Traveled Way Design (Edge Returns)
  6A-11...................Stop Sign Islands

6B

Geometric Design of Interchanges

 
  6B-1...................Cross Sections of One and Two Lane Ramps and Loops
  6B-2...................County Roads through Interchanges
  6B-3...................County Roads over Primary Highways
  6B-6...................Accesses and Safety Dikes at Ramp/Loop Terminals

6C

Geometric Design of Lanes

 
  6C-1...................Adding, Dropping, or Redirecting Through Lanes
  6C-5...................Four-Lane Expressway Turn Lanes
  6C-6...................Continuous Two-Way Left-Turn Lanes (TWLTLs)
  6C-8...................Parking on Urban Highways

6D

Sight Distance

 
  6D-1...................Sight Distance
Chapter 7 — Pavement  

7A

Portland Cement Concrete

 
  7A-2...............Jointing Guidelines
  7A-3...............Jointing Rural Intersections
  7A-4...............Jointing Urban Intersections
  7A-5...............Jointing Cul-de-Sacs

7C

Granular Surfaces

 
  7C-1...............Granular Surfacing

7D

Other

 
  7D-1...............Determination of Reinforced Bridge Approach Section Dimension
  7D-4...............Treatment of Old Roadbeds
  7D-8...............Pavement Widening on Resurfacing Projects for Non-NHS Highways
  7D-10.............Tabulating Adjustment of Manholes, Intakes, Fire Hydrants, and Other Fixtures
Chapter 8 — Roadside Safety  

8A

Introduction

 
  8A-1...................Introduction to Roadside Safety
  8A-2...................Clear Zones
  8A-3...................Treatment Options for Obstacles within the Clear Zone
  8A-4...................Warrants for Specific Obstacles

8B

Treatments

 
  8B-2...................Culvert Opening Safety Treatments
  8B-5...................Choosing a Barrier
  8B-6....................Locating a Barrier
  8B-10.................Tabulating Guardrail

8C

Barrier Design

 
  8C-2...................Guardrail and Curbs
  8C-3...................High Tension Cable Guardrail 
  8C-5...................Crash Cushions
  8C-6...................Treatment of Existing Guardrail Installations 
Chapter 9 — Traffic Control  

9A

Principles

 
  9A-1...................Fundamental Principles of Traffic Control in Work Zones
  9A-2...................Traffic Control Zones
  9A-3...................Tapers
  9A-4...................Regulatory Speed Limit Changes
  9A-5...................Traffic Control Plans

9B

Traffic Control Devices

 
  9B-1...................Basic Requirements of Traffic Control Devices
  9B-2...................Signs
  9B-3...................Channelizing Devices
  9B-4...................Raised Pavement Markers and Delineators
  9B-5...................Warning Lights
  9B-6...................Floodlights
  9B-7...................Arrow Displays
  9B-8...................Changeable Message Signs
  9B-9...................Temporary Barrier Rail
  9B-10.................Road Closures

9C

Work Zone Applications

 
  9C-1...................Introduction to Work Zone Activities
  9C-2...................Work Located Off the Traveled Way
  9C-3...................Work on Two-Lane Roadways
  9C-4...................Work on Multi-Lane Roadways
  9C-5...................Control of Traffic through Incident Areas
  9C-6...................On-Site Detours and Temporary Connections
  9C-7...................Haul Road Crossings

9D

Pavement Markings

 
  9D-1...................Pavement Markings
Chapter 10 — Roadside Development and Erosion Control

10A

Topsoil

 
  10A-1.................Topsoil Replacement  

10B

Seeding, Fertilizing, and Mulching

 
  10B-1.................Seeding, Fertilizing, and Mulching

10C

Erosion Control

 
  10C-1.................Temporary Sediment Control Devices
  10C-2.................Storm Water Detention
  10C-3.................Vegetated Buffers
  10C-4.................Temporary Sediment Control Devices for Intakes and Manholes
  10C-5.................Temporary Sediment Control in Urban Areas

10D

Permits

 
  10D-1.................Storm Water Discharge Permits  

10E

Fencing

 
  10E-1..................Fencing  
Chapter 11 — Other Design Topics

11D

Miscellaneous

 
  11D-1.................Casing Pipe
  11D-2.................Noise Wall Design Process
Chapter 12 — Sidewalks and Bicycle Facilities

12A

Sidewalks

 
  12A-1.................General Sidewalk Requirements
  12A-2.................Accessible Sidewalk Requirements
  12A-3.................Protruding Objects
  12A-4.................Pedestrian Facilities During Construction

12B

Bicycle Facilities

 
  12B-1.................Pedestrian and Bicycle Facilities
  12B-2.................Shared Use Path Design
  12B-10...............Pedestrian Path Guidelines: Safety Rail

12C

Detailed Design Criteria

 
  12C-1.................Check for ADA Compliance
Chapter 20 — Project Automation Information  

20A

Starting a New Project - General

 
  20A-1................Start New MicroStation Project
  20A-2................Survey Request
  20A-3................Plan Development CADD Standards
  20A-20..............Attaching Reference Ties and Bench Marks

20B

Folders and Files

 
  20B-1..................Design Seed File Listing
  20B-41................Project Directory Folder Structure
  20B-44................Project Directory Design Folder Structure
  20B-45................File Naming CCRRRPPPGGG Notation
  20B-51................Folder and Files, Photo and Survey
  20B-71................Electronic Files Supplied by the Office of Design
  20B-72................Engineering Content to Review in Digital Deliverables
  20B-73................Methods for Reviewing Digital Deliverables Content
  20B-75................Office of Location and Environment File Exchange
  20B-81................Project Directory Letting Folder Structure

20D

GEOPAK Setup and General Information

 
  20D-2.................GEOPAK® Element and File Naming Convention
  20D-101.............OpenRoads Files and Naming Conventions
  20D-102.............OpenRoads Element Naming Conventions

20F

Modeling & Geopak Cross-Sections

 
  20F-21................Corridor Modeler - Bridge Berm
  20F-30................Preparing for Earthwork

20H

Geopak 3D and Machine Control Grading

 
  20H-10................Creating XML Machine Guidance Files
  20H-20................Converting DGN to DXF

20J

Project Bid Items & Quantities (PSS)

 
  20J-61................Calculation Files
  20J-62................Earthwork Calculation Program 
  20J-71................Project Locator
  20J-81................Accessing the Project Scheduling System
  20J-82................Bid Item Information
  20J-83................Importing Bid Items
  20J-86................Alternate Bid Item Sheet Formatting
Chapter 21 — Automation Tool Instructions  

21A

D & C Manager Tools

 
  21A-1.................CPN Data Instructions; Model, Data, and Attachment
  21A-5.................InfoSnap – Quick Info
  21A-6.................Open Explorer to Working Directory
  21A-7.................Remove Empty Text Strings
  21A-8.................Sink/Restore Dialogs
  21A-11...............VBA Tool Box, Horizontal
  21A-12...............VBA Tool Box, Vertical
  21A-21...............Cell Clipper
  21A-22...............Copy, Rotate, and Scale tool
  21A-23...............Measure Horizontal Distance
  21A-24...............Measure Slope Distance
  21A-25...............Move Element(s) From Level to Level
  21A-26...............Rotate (Active Elements)
  21A-27...............Text, Change Size
  21A-36...............Create Backup File on “C” Drive
  21A-37...............Level Match
  21A-38...............Turn Selected Levels On/Off
  21A-39...............Ref-Map
  21A-40...............Create New Models
  21A-41...............Model Export and Import
  21A-42...............Model Rename
  21A-43...............Save Model to the Alt File
  21A-44...............Model Search
  21A-45...............Raster Replace Drive Letter with Server Name
  21A-46...............Ref File Level Lock
  21A-48...............Reference Display, On-Off
  21A-49...............Reference List
  21A-50...............Reference Attach
  21A-51...............Reference Detach
  21A-52...............Legend and Symbol Information Sheets
  21A-53...............Text Labeler
  21A-80...............Batch Print Shape Placement
  21A-81...............Border Send to Back and Copy Print Border
  21A-150.............Color Changer
  21A-151.............Multi Scale Creator
  21A-201.............COGO Alignments, Plan View
  21A-202.............COGO Profiles, Alignments
  21A-203.............COGO Profiles, Entrance
  21A-204.............COGO Ditch Grade Placement Tool
  21A-206.............InDGN Lines
  21A-502.............PPP (Pollution Prevention Plan) Instructions
  21A-503.............Existing Utility Legend
  21A-600.............Soils Borrow Quantity Text Box
  21A-800.............The D&C Compute Mode

21B

Geopak

 
  21B-2................Motif and Layout Builder programs for P&P Sheeting
  21B-3.................P & P Sheet - DBG Guide Cells
  21B-4.................P & P Geopak Sheeting Instruction
  21B-5.................P & P Sheeting Library Development
  21B-6.................P & P Port Shape Parameters
  21B-7.................P & P Sheeting Port Names, Levels, Colors
  21B-20...............Roadway Cross-Section Sheet Composition
  21B-22...............Granular Blanket Cross-Section Line-Work
  21B-23...............Drawing Utility Symbols with GEOPAK Ancillary Features
  21B-58...............Geopak Tables
  21B-65...............Geopak Project Manager
  21B-68...............Superelevation – Automated
  21B-155.............Typical Component Tool
  21B-156.............Geopak TIN to XML Conversion
  21B-157.............DTM Draw Surfaces
  21B-158.............Surface Clipping
  21B-159.............Creating Profiles from Survey Shots
  21B-200.............Corridor Modeler
  21B-224.............Corridor Modeler Templates and Components
  21B-250.............Draw Cross Sections from Surfaces
  21B-270.............Developing 3D Models for Design Projects
  21B-280.............Corridor Modeler Labeler
  21B-290.............Drive Roadway-Corridor Modeler
  21B-300.............Draping Raster Images

21C

MicroStation

 
  21C-33...............PDF Scroll, Creating & Plotting
  21C-53...............Hyperlinks in Microstation
  21C-54...............CopySeed Program
  21C-55...............View Groups vs Models
  21C-56...............Attach a Multipage PDF to a MicroStation File
  21C-70............... Creating a KMZ File from MicroStation Line Work
  21C-71............... Geographic Coordinate Systems in MicroStation

21E

Printing, Plan Turn-ins

 
  21E-1................MicroStation Batch Printing to PDF
  21E-4................Color Plan Procedures

21F

DOT ProjectWise System

 
  21F-1................NonDOT User Access to Iowa DOT ProjectWise System
  21F-10..............ProjectWise Basics
  21F-21..............Exporting and Importing Documents from ProjectWise 
  21F-22..............ProjectWise Hyperlinks
  21F-23..............ProjectWise Email Attachments
  21F-24..............ProjectWise Replacing Documents
  21F-25..............Reference Scanning CADD Files in ProjectWise

21M

Miscellaneous Topics

 
  21M-1.................FTP Site Access
  21M-11...............Creating Hyperlinks
  21M-12...............Create File and Folder Listing
  21M-39..............Work Schedule Instructions
  21M-41..............Long Term Project E-mail Storage
  21M-42..............How to Capture the Full Path to a File
  21M-43..............File Extensions do not Display - Windows 7
  21M-45..............Cost Estimates Quick Guide
  21M-46..............Cost Estimates Program Details
  21M-47..............iPD Project Cost Estimating
  21M-51..............Superelevation Transition Evaluation Tool
  21M-61..............Post Letting Plans
Chapter 40 — Design Survey Specifications  

40B

Surface Topography Data Collection

 
  40B-1.................Feature Codes – Full Descriptions
  40B-2.................Feature Codes - Titles Only
  40B-3.................Feature Codes - Categories
  40B-4.................Feature Codes - Modifications
  40B-5.................Full and Partial DTM Surveys
  40B-7.................Bridge Data Collection
  40B-8.................Culvert Data Collection
  40B-9.................Storm Sewer Intakes and Manhole Data Collection
  40B-10...............Feature Codes for Roadway Survey
  40B-11...............Feature Codes for Entrance and Intersection Survey
  40B-12...............Feature Codes for Curb & Gutter Survey

40D

MicroStation and GEOPAK Survey Mapping Process

  40D-1.................Folder Structure and File Naming
  40D-2................Survey Preferences
  40D-3.................Loading Datasets
  40D-4.................Editing Survey Data
  40D-5.................Checking for Crossing Chains
  40D-6.................Creating Horizontal Alignments
  40D-7.................Processing Datasets in Models and Zones
  40D-8.................Build DTM from Elements
  40D-9.................Build DTM from Survey Data
  40D-10...............Editing the DTM
  40D-11...............Drawing Contours
  40D-12...............Using Design and Computation (D&C) Manager
  40D-13...............Drawing Horizontal Alignments
  40D-14...............Station and Offset Reports
  40D-15...............Completing the G Sheet
  40D-16...............GEOPAK Survey TOPO Model Links
  40D-17...............How to Use the Survey Information
Chapter 70 — Methods Processes  

70A

Formatting Guidelines

 
  70A-10...............Data Entry Sheets - Formatting Guidelines
Chapter 120 — Specifications

120A

Specifications Documents

 
  120A-1...............Specifications Overview
  120A-2...............Developmental Specifications
  120A-3...............Special Provisions
  120A-4...............Writing Specifications
Chapter 200 — Geotechnical Design

200A

Overview of Geotechnical Design

 
  200A-1...............Introduction
  200A-2...............Project Coordination
  200A-3...............Geotechnical Consultant Services and Review

200B

S Events

 
  200B-1...............The S1 Event
  200B-2...............The S2 Event
  200B-3...............The S3 Event
  200B-4...............The S4 Event

200C

Surface Investigation Methods

 
  200C-1...............Subsurface Investigation Methods

200D

Laboratory Testing

 
  200D-1...............Laboratory Testing

200E

Engineering Properties of Soil and Rock

 
  200E-1...............Engineering Properties of Soil and Rock

200F

Analysis, Design, and Treatment

 
  200F-1...............Slope Stability
  200F-2...............Embankments
  200F-3...............Mechanically Stabilized Earth (MSE) Wall Evaluations
  200F-4...............Driven Pile Design
  200F-5...............Drilled Shaft Design
  200F-6...............Intermediate Foundation Improvements (IFIs)
  200F-7...............Prefabricated Vertical Wick Drains (PVDs)
  200F-8...............Rock Cut Slopes
  200F-9...............Geosynthetic Design
  200F-10.............Landslide Analysis and Mitigation
  200F-11.............Soil Cut Slopes

200G

Construction Involvement

 
  200G-1...............Construction Involvement

200H

Emergency Relief Projects

 
  200H-1...............Emergency Relief Projects

200I

Appendix A – Consultant Geotechnical Work Requirements

  200I-1...............Appendix A - Consultant Geotechnical (Soils Design) Work Requirements

Design Manual Video Index

 
Revision Letters