The main purpose of a Traffic Impact Study (TIS) is to assess the potential impact of traffic generated by a proposed development or redevelopment and to identify the roadway improvements required to ensure that the road network will operate safely and efficiently upon completion of the development. 

A TIS also identifies on-site and off-site improvements that might be needed as a result of the development and it plays an important role in the development review and approval process. Many local governments have established guidelines and policies that govern their site development and review process. Usually the requirement to perform a Traffic Impact Study is based on number of trips generated by the site, type and size of the development, and other area characteristics. 

A TIS should be prepared under the supervision of a qualified and experienced transportation professional who has specific training in traffic and transportation engineering and planning. In addition, all transportation operations and design work stipulated in the TIS recommendations should be completed under the supervision of a qualified and experienced professional engineer in conformance with province and local professional requirements.

The list of traffic impact study guidelines by major cities in Ontario:

City of Toronto

City of Mississauga 

City of Niagara Falls

City of Guelph 

City of Hamilton

Traffic impact study services is one of our main services at Trans-Plan. We possess analytical tools and databases to assist in resolving transportation matters to the satisfaction of both our clients and the reviewing agencies. We develop analytical techniques and physical design solutions to solve issues of off-site impact, site access requirements and intersection optimization. Through the information collected, Trans-Plan implements the necessary knowledge to improve the optimization of specific sites and intersections. Trans-Plan provides effective public presentations and expert testimony as required, and has the expertise in the planning approval process in most jurisdictions.

Traffic Impact Study Services:

  • Traffic trip generation and distribution pattern

  • Preliminary site assessment

  • Transportation capacity assessment

  • Site access location, design and implications for off-site improvements

  • Site access operations and traffic signal warrants

  • Intersection capacity analysis

  • Representation at public meetings, and municipal approval process statutory meetings

  • Providing expert testimony (in transportation & traffic) for development application hearings at the municipal Local Planning Appeal Tribunal (LPAT) and at the Toronto Local Appeal Body (TLAB)