The District was established by referendum on May 25th, 1971. It is responsible for the construction and maintenance of all streets and roads in Ada County, except those designated as state or federal highways. ACHD provides planning, design, construction, reconstruction, maintenance, and traffic supervision for all urban streets, rural roadways, and bridges under its jurisdiction.

The Policy Manual is provided as a service and may not reflect the latest changes to the formal document. The most current version is available at ACHD headquarters or can be obtained by calling 208-387-6100.

Manual by Sections

Table of Contents Section Title Pages

• Section 1000 - Ada County Highway District
  • 1001 - General Overview
  • 1002 - Legislative Authority
  • 1003 - Organization
  • 1004 - Board of Commissioners
  • 1005 - Duties & Privileges of the District Commissioners
  • 1006 - Commission Procedures
  
  
• Section 2000 - General Administration
  • 2001 - Finance/Accounting
  • 2002 - Cost Reporting
  • 2003 - Year-end Statements
  • 2004 - Financial Statements
  • 2005 - Budget
  • Section 2000 Exhibits
  
  
• Section 2100 - Safety Handbook


• Section 2300 - Affirmative Action Plan


• Section 2400 - Benefits
  • Section 2400 Exhibits


• Section 2500 - Personnel Policy
  • Section 2500 Exhibits


• Section 3000 - Project Design
  • 3001 - General Overview
  • 3002 - Design Function
  • 3003 - Design Standards & Specifications
  • 3004 - Roadway Design Standards
  • 3005 - Project Checklist
  • Section 3000 Exhibits


• Section 3100 - Development of Projects
  • 3101 - Project Overview
  • 3102 - Project Need and Concept
  • 3103 - Project Estimated Costs
  • 3104 - Project Field Review
  • 3105 - Preliminary Design
  • 3106 - Final Design
  • 3107 - Plans Configuration
  • 3108 - Bidding and Contract Award
  • 3109 - Cost Share Ordinance
  • Section 3100 Exhibits


• Section 3200 - Local Improvement Districts


• Section 3300 - General Surveying
  • Section 3300 Exhibits


• Section 4000 - Right-of-Way and Acquisition and Management
  • 4001 - District Right-of-Way Manual
  • 4002 - Vacation & Abandonment of Public Rights-of-Way
  • 4003 - Encroachments
  • 4004 - Exchanges
  • 4005 - Property Management
  • 4006 - Negotiations
  • 4007 - Professional Services
  • 4008 - Appraisal Reports
  • 4009 - Acquisition and Offers of Just Compensation
  • 4010 - Administrative Settlements
  • Section 4000 Exhibits


• Section 5000 - Traffic and Transportation


• Section 5100 - Traffic Engineering
  • 5101 - Traffic Design
  • 5102 - Traffic Studies
  • 5103 - Traffic Data & Analysis
  • 5104 - Traffic Investigations
  • 5105 - Permits & Fees
  • 5106 - Roadway Lighting
  • 5107 - (Reserved)
  • 5108 - Roundabouts
  • 5188 -Roundabouts Design Guide
    • Roundabouts Design Guide Appendices A-C


• Section 5200 - Traffic Operations
  • 5201 - Traffic Signals
  • 5202 - Signs and Markers
  • 5203 - Striping and Pavement Markings
  • 5204 - Work Orders
  • 5205 - Record Keeping
  • 5206 - Digline/Utility Coordination


• Section 5300 - Ride Sharing


• Section 6000 - Construction, Permits & Inspection
  • 6001 - Definitions
  • 6002 - Scope and Responsibility
  • 6003 - Standards and Specifications
  • 6004 - Permit and Subdivision Inspection
  • 6005 - Sidewalk
  • 6006 - Five Year Moratorium
  • 6007 - Temporary Highway Use Permits (Resolution 549, 1/1/99)


• Section 7000 - Land Development Requirements


• Section 7100 - General Requirements & Procedures for Development
  • 7101 - Approval Process
  • 7102 - Plat Requirements and Content
  • 7103 - Agreements
  • 7104 - Modification and Waivers of District Development Policy
  • 7105 - Improvement Plans Submittal Contents
  • 7106 - Traffic Impact Studies, Special Intersection Studies and Master Plans
  • 7107 - Coordination with utilities and the District
  • 7108 - Project inspection Requirements
  • Section 7100 Exhibits


• Section 7200 - Technical Requirements (Development)
  • 7201 - Street Classification
  • 7202 - Access Management
  • 7203 - Development Requirements
  • 7204 - Design Elements
  • 7205 - Improvement Plans Submittal Contents
  • 7206 - Collector Streets
  • 7207 - Local Streets
  • 7208 - Commercial Streets
  • 7209 - Industrial Streets
  • 7210 - Alleys
  • 7211 - Intersection Design
  • 7212 - Private Roads
  • 7213 - Private Non-Regulated Utilities
  • 7214 - Stormwater
  • 7215 - Miscellaneous Requirements
  • Section 7200 Exhibits


• Section 7300 - Impact Fee Ordinance
  • Ordinance 246A


• Section 8000 - Drainage & Stormwater Management


• Section 8200 - Stormwater Design Manual
  • Stormwater Design Spreadsheet (Zip file)


• Section 8300 - Construction Site Discharge Control Program
  • Section 8300 Exhibits


• Section 9000 - Maintenance Services

Interim Policies

• Interim Policy - Kuna-Mora Road

Idaho Standards Public Works Construction (ISPWC)

• ACHD's 2017 Supplemental Specifications to the 2017 ISPWC Manual
• ACHD's 2015 Supplemental Specifications to the 2015 ISPWC Manual
• ACHD's QC-QA Supplements & Minimum Testing Frequency Table

ACHD Traffic Standards

• ACHD Traffic Standards- Requirements for ACHD Roadways

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