Traffic Impact Studies Introduction What is a traffic impact study (TIS)? A study to identify impacts to a work due to a proposed development (or change to an existing development) monly called traffic impact analysis (TIA). Who Requires Them? Governmental agencies (city, county, state) require them to determine necessary mitigation for proposed development as a result of increased traffic demands on work These agencies will have established thresholds regarding when studies need to be performed, such as: X number of generated peak hour trips Site impacts a high-accident location Specific site access or safety issues are of concern Why are they necessary? Why are they necessary? Satisfy goals of growth management Transportation infrastructure is provided concurrently with the needs of development generated traffic Ensures that developers pay their fair share of transportation infrastructure improvements Who performs TIS’s? Usually consultants, hired by developers Professional Engineering (.) licensing usually required Procedure Preliminary Obtain plans/details from developer or architect Site visit Determine scope of project impacted intersection/roadways need for special analyses Accident Parking Site access
