What are the key components of a traffic impact analysis?

Traffic impact analysis (TIA) evaluates development effects on transportation: (1) Trip generation - ITE rates or local data for proposed land use, (2) Trip distribution - directional split based on market area, (3) Traffic assignment - routes to/from site, (4) Background traffic - existing plus other approved developments, (5) Horizon year analysis - build vs no-build comparison, (6) Capacity analysis - intersections, driveways, site circulation, (7) Mitigation measures - turn lanes, signals, site access modifications. TIA scope depends on trip generation magnitude and local requirements.