Traffic Impact Studies in Waterloo Region

Understanding the Transportation Requirements for Your Development

A Transportation Impact Study (TIS) evaluates how a proposed development will affect the surrounding transportation network and identifies improvements needed to accommodate future travel demand. In Kitchener and Waterloo, transportation assessments consider intersection capacity, traffic congestion, site access, vehicle queues, road safety, transit services, cycling facilities and pedestrian connectivity.

A TIS may be required to support applications such as Official Plan Amendments, Zoning By-law Amendments, Plans of Subdivision, Plans of Condominium and Site Plan Control. The need for a study depends on the development’s anticipated traffic generation, location, access arrangements and potential impacts on the surrounding transportation network.

What Does the TIS Process Involve?

1. Establishing the Study Scope

The process begins with consultation with the applicable city and, where necessary, the Region of Waterloo and other road authorities. The study scope identifies the analysis area, traffic-count requirements, peak periods, forecast horizons, relevant background developments and technical modelling methods. In Waterloo, a pre-study conference is required to determine whether a full TIS or a more focused Transportation Study is appropriate.

2. Reviewing Existing Conditions

The consultant documents the surrounding road network, intersection configurations, traffic controls, transit routes, sidewalks, cycling facilities and existing access points. Traffic counts, turning movements, signal timing data, collision records and vehicle queues are reviewed to establish baseline conditions. Planned infrastructure improvements and other approved or proposed developments are also considered.

3. Forecasting Future Travel Demand

The study estimates development-generated traffic and its distribution across the surrounding network. Future forecasts incorporate background traffic growth, nearby developments and planned transportation improvements. The analysis typically compares existing conditions, future background conditions without the development, and future total conditions with the development. Interim development phases and alternative access arrangements may also require assessment.

4. Evaluating Traffic Operations, Safety and Multimodal Impacts

The consultant assesses intersection capacity, delays, volume-to-capacity ratios, turning movements and queue storage. Potential conflicts affecting pedestrians, cyclists and transit users are also evaluated. Site access arrangements, sight distances, loading areas, driveway interactions and the risk of queues extending onto adjacent roads receive particular attention.

5. Developing Mitigation Measures

Where deficiencies are identified, the study recommends improvements such as turning lanes, intersection modifications, traffic signals, roundabouts, access restrictions or revised site circulation. The analysis considers whether these measures are feasible and how they affect all road users, rather than focusing exclusively on vehicle capacity.

6. Preparing and Submitting the Report

The final report documents the study scope, assumptions, data, forecasts, analysis, conclusions and recommended improvements. Supporting appendices include traffic data, modelling outputs and technical calculations. Recommendations should identify required improvements and implementation timing, supported by functional designs where necessary. Reports must meet the applicable municipal and Regional submission requirements.

What Makes Kitchener-Waterloo’s Requirements Distinctive?

A defined Regional traffic-generation threshold: The Region of Waterloo’s published guidelines generally call for a TIS where a development will generate 100 or more new peak-direction automobile trips during either the adjacent roadway’s peak hour or the development’s peak hour. A study may also be requested for smaller developments where localized safety or road-capacity issues exist, or where multiple developments collectively exceed the threshold.

Mandatory consideration of roundabouts: When new traffic signals are proposed, or road improvements are being considered to address capacity or safety deficiencies, the Region’s guidelines require a roundabout to be considered as an alternative. An initial screening may lead to a more detailed Intersection Control Study comparing safety, traffic operations, property impacts, accessibility, construction costs and 20-year life-cycle costs.

Transportation Demand Management and parking management: The Region provides a TDM Checklist and a supplementary, voluntary Parking Management Worksheet. In specified Urban Growth Centres, Major Transit Station Areas and Reurbanization Corridors in Kitchener and Waterloo, the checklist applies to certain Official Plan Amendment, Zoning By-law Amendment and Site Plan applications. A qualifying score of 24 points or more may support consideration of reduced road-improvement requirements where the recommended measures are appropriately secured. Parking reductions remain subject to local municipal approval.

Regional-road access and queue management: Access points on Regional roads are assessed for capacity, safety, spacing and queue storage. The study considers interference between adjacent accesses, turning restrictions, acceleration or deceleration lanes, truck loading, emergency access and the potential for vehicles to queue onto Regional roads. Accesses on minor roads are preferred where feasible.

A multimodal safety assessment: The study evaluates transit service, pedestrian connections, cycling facilities and road safety alongside conventional vehicle operations. It considers sidewalk continuity, crossing opportunities, transit-stop access, cycling-network connectivity, traffic speeds and potential collision risks. Proposed mitigation measures should improve safety and connectivity for all users.

A separate municipal review process in Waterloo: The City of Waterloo requires a pre-study conference for a requested TIS, including a concept plan, pre-study form and draft report table of contents. A scoped Transportation Study may be accepted where impacts are limited. The City also requires reports to comply with accessibility requirements and publishes a separate Terms of Reference for Parking Studies.

Plan Ahead for Development Approval

Early consultation with the applicable city and the Region of Waterloo helps establish the required study scope, identify access constraints, evaluate alternatives and determine the appropriate infrastructure improvements. Integrating traffic operations, parking, TDM and active transportation into the initial site design can help reduce redesign and support a more efficient development application review.

References: Region of Waterloo — Transportation Impact Study Guidelines; City of Waterloo — Terms of Reference: Transportation Impact Study. Requirements depend on the proposal, road jurisdiction and applicable local municipal policies. Our team has in-depth expertise at conducting these assessments. Contact us today to find out how we can help with your project.