Traffic Impact Studies in Halton 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 the improvements required to support safe and efficient traffic operations. In Halton Region, the assessment considers the impact of new development on Regional, local and, where applicable, provincial roadways, including intersections, site access points, transit operations and vulnerable road users. This is a general guide to traffic impact studies in the City of Burlington, the Town of Halton Hills, the Town of Milton, and the Town of Oakville, however the municipalities will also have their own specific processes.

A TIS can support development applications involving Official Plan Amendments, Zoning By-law Amendments, Plans of Subdivision, Site Plan Control and other approvals where a proposal may significantly affect transportation operations. The scope and complexity of the study depend on the development’s size, location, anticipated traffic demand and surrounding road conditions.

What Does the TIS Process Involve?

1. Establishing the Study Scope

The process begins with consultation involving Halton Region, the relevant local municipality and other road authorities, as appropriate. The consultant confirms the study area, analysis periods, forecast horizons, data requirements and modelling methodology. This early coordination helps identify jurisdiction-specific requirements and establish a suitable scope of work.

2. Assessing Existing and Future Conditions

The consultant reviews traffic volumes, intersection operations, transit services, road geometry, cycling facilities, pedestrian routes and existing access arrangements. Traffic counts, collision records, queue surveys and signal timing data may be collected or obtained from relevant authorities. The study also accounts for traffic growth, surrounding development applications and planned transportation infrastructure.

3. Forecasting Development Traffic

The study estimates the number of trips generated by the proposed development, their distribution across the network and their assignment to nearby roads and intersections. Forecasting generally considers five-year future conditions and, depending on development size and phasing, a ten-year horizon. Morning and afternoon peak periods are typically assessed, with additional periods potentially required for retail, entertainment, institutional, recreational and other uses with different traffic patterns.

4. Evaluating Capacity, Safety and Site Access

Existing and future traffic conditions are analyzed to assess intersection capacity, vehicle delays, volume-to-capacity ratios and queue lengths. The study also evaluates safety concerns such as sightline deficiencies, merging and weaving conflicts, pedestrian and cyclist interactions, heavy-vehicle movements and traffic queues that could affect adjacent roads.

5. Recommending Improvements

Where deficiencies are identified, the consultant develops feasible mitigation measures. These may include intersection modifications, turning lanes, traffic signal improvements, revised access arrangements or changes to site circulation. The study identifies recommended improvements, their timing and implementation considerations, and provides preliminary cost estimates for identified infrastructure improvements.

6. Preparing the Technical Report

The final report presents the development description, study area, traffic forecasts, operational analyses, safety findings, mitigation alternatives and recommendations. Supporting appendices document traffic data, modelling assumptions and detailed analysis results. Additional functional design drawings may be required to demonstrate that proposed improvements are feasible.

What Makes Halton Region’s Requirements Distinctive?

Regional-road access management: Access points on Regional roads receive particular attention. The analysis considers access spacing, sight distance, turning movements, queue storage, acceleration or deceleration lanes, loading facilities and potential pedestrian or cycling conflicts. The guidelines generally favour access through the local road network wherever feasible and require additional Regional-road accesses to be justified.

Defined operational thresholds: The guidelines identify conditions that trigger further mitigation analysis. At signalized intersections, these include volume-to-capacity ratios of 0.85 or higher for overall operations, through movements or shared through/turning movements; ratios of 0.95 or higher for exclusive movements; and queues exceeding available turning-lane storage. At unsignalized intersections, individual-movement performance worse than Level of Service D or queues exceeding available storage also warrant attention.

Traffic safety and sight-distance assessments: Site accesses and proposed new-road intersections must be evaluated using field-measured sight distances and applicable design guidance. The assessment considers collision history where relevant, transit conflicts, pedestrian and cyclist safety, heavy vehicles and the potential for traffic to spill back onto Regional roads.

Future transportation demand and transit: Background traffic forecasts must account for other approved or proposed developments and planned transportation improvements. Where development-related transit demand is expected to increase ridership at a transit service, stop, station or terminal by 5% or more, the guidelines call for an assessment of the effect on that service or facility.

Transportation Demand Management (TDM): The guidelines encourage strategies that reduce single-occupant vehicle travel and support a more balanced mix of travel modes. Measures may include carpooling, transit incentives, pedestrian and cycling infrastructure, bike-share programs, parking management and flexible work arrangements.

Implementation and cost planning: Recommended improvements must be coordinated with planned infrastructure works, surrounding development timelines and project phasing. Preliminary cost estimates are required for identified infrastructure improvements, helping clarify potential implementation requirements.

Plan Ahead for Development Approval

Early consultation with Halton Region and the relevant local municipality helps establish the correct study scope, identify Regional-road constraints and coordinate transportation requirements across jurisdictions. Incorporating access design, traffic mitigation and transportation demand management early in the development process can reduce redesign risks and support a more efficient application review.

Reference: Halton Region — Transportation Impact Study Guidelines. Specific requirements depend on the proposal, the affected road authorities and the scope confirmed with reviewing staff.

Our team has in-depth expertise at conducting these assessments. Contact us today to find out how we can help with your project.