Major Traffic Generators

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Traffic Alert: Both directions of I-95 in Norwalk near Exit 15 are closed due to significant structural damage caused by a motor vehicle collision. Commuters are urged to avoid the area until further notice. Governor Lamont has declared a state of emergency. READ MORE

Major Traffic Generators

Any new, expanded, changed, or repurposed (land use change) development with 100,000 square feet or more of gross floor area or 200 or more parking spaces, requires OSTA approval to ensure safe operation on State roads. Residential developments of 100 units or less are exempt. The review & approval of MTGs is accomplished by either an Administrative Decision (AD) or Certification Process (Certificate).

List of Certificates and Administrative Decisions

Interactive Map

**NEW** Trip Generation Guidelines - October 2023

If you are a developer/consultant and are unsure if a development requires OSTA regulation:

flowchart to determine whether OSTA regulation is required.

If the development requires OSTA Regulation:

If the development is part of an existing Major Traffic Generator:

flowcharts to determine whether a development requires OSTA review if the development is part of an existing Major Traffic Generator

Regulation by Administrative Decision (AD). Regulation by Certification Process (Certificate).

Return to OSTA home page