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Comprehensive Study Framework for Transportation Impact Analysis in the City and County of Honolulu – Structure, Scope, and Content

Study Contents and Organization

Every Transportation Impact Analysis (TIA) should follow a consistent structure and include key elements to ensure clarity, completeness, and compliance with the City and County of Honolulu’s policies. The scope and depth of the study will be determined during the scoping process and defined in the scoping memorandum. The TIA should also include references to other applicable traffic studies or planning documents.

TIA Structure

In general, a complete TIA will be organized into the following sections:

  1. Project Background, Description, and Study Area

  2. Multimodal Transportation Impact Analysis

  3. Project Mitigation Measures

  4. Conclusions and Recommendations

  5. Appendices (supporting documentation, data, and figures)

5.1 Project Background, Description, and Study Area

This section provides context and foundational project details, including:

A. Table of Contents

  • Include a list of tables and figures for easy reference.

B. Project Background

  • Site Location: Exact location and cross streets.

  • Application Information: Project sponsor, case number, and any previous related applications.

  • Project Proposal: A concise description of the development proposal.

  • Design Statement: Explanation of how the project aligns with Complete Streets principles and sustainable mobility goals.

C. Project Description

  • Site Plan: Layout including address, cross streets, tax map keys, parcel outlines, and land use details.

  • Land Use Summary: Total gross square footage for each land use, and existing vs. proposed uses.

  • Unit Count: Number of units and bedrooms for residential, hotel, or mixed-use projects.

  • Parking: Number of existing and proposed motor vehicle and bicycle parking spaces, and changes to on-street or off-street parking.

  • Loading: Details of freight loading spaces and any changes to on-street or off-street loading zones.

  • Public Right-of-Way Usage: Proposed changes or use of public space (e.g., sidewalk widening, lane changes, air rights).

  • Access and Circulation: Access points and connections for:

    • Vehicles, pedestrians, bicycles, and transit

    • Bikeshare and AV (autonomous vehicle) facilities

    • On-site circulation for deliveries, pedestrians, and vehicles

  • Parking Figures: Visual representations of:

    • Quantity and configuration of all parking spaces

    • Vehicle and bicycle ingress/egress points

    • Circulation patterns and EV/ADA space compliance

  • Loading Figures: Diagrams showing location and design of freight and refuse areas.

  • Phasing Plan: Timeline for project phases and completion milestones.

D. Plan Conformity

  • Demonstrate consistency with the Oahu General Plan, regional development plans, neighborhood TOD plans, and other applicable city or state plans.

E. Project Study Area

A detailed description and justification of the study area must be included. It should cover:

  • Priority Networks: Identification of pedestrian, bike, and transit priority networks using the Complete Streets Design Manual, Oahu Bike Plan, and Pedestrian Plans.

  • Street Access: Description of vehicular access routes, including nearby freeways, on-ramps, and designated bikeways.

  • Transit Facilities: Public transit coverage including:

    • Route names and maps

    • Stop locations and vehicle types

    • Operating hours and peak headways

    • Boarding and alighting data

  • Street Characteristics: Lane widths and counts, direction of flow, traffic control features, ADT volumes (from the past three years), and any traffic calming elements like bulb-outs or speed humps.

  • Sidewalk Infrastructure: Width, ADA accessibility, and connections to transit stops.

  • Parking Characteristics:

    • Total on-street spaces and applicable controls (meters, time-limits, permits)

    • Off-street facilities (public and private)

    • EV charging station availability

    • Parking configurations (independent vs. tandem/valet)

    • Peak demand generators or constraints (e.g., hospitals, stadiums)

    • Bicycle parking within 100 feet of building entrance

    • Location and size of bikeshare facilities and any related correspondence with providers like Bikeshare Hawaii.

Our Services are available throughout City of Honolulu with Zipcodes 96844, 96846, 96847, 96848, 96849, 96850, 96853, 96854, 96857, 96858, 96859, 96860, 96861, 96863, 96898

Serving Both Public and Private Sector Clients

Based in Los Angeles California, our firm provides comprehensive transportation consulting services from conceptual planning onward, with the goal of delivering efficient, high-quality creative solutions and seeing them through to the completion of projects. We have skilled traffic engineers and transportation planners to undertake a variety of projects with confidence while meeting the needs of a diverse clientele.

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