The Office of the State Traffic Administration (OSTA) promulgates regulations establishing a uniform system of traffic control signals, devices, signs, and markings for public highways/roadways. The OSTA also adopts additional regulations in cooperation and agreement with local traffic authorities governing the use of state owned and maintained highways/roadways. Direct links to OSTA Regulations may be found here: Interactive & Printer Friendly (rev. 2018-1-3)

OSTA has adopted the relevant portions of the Manual on Uniform Traffic Control Devices (also known as the M.U.T.C.D.), latest edition as part of its regulations establishing a uniform system of traffic control signs, devices, signals, and markings. A copy of the MUTCD may be found here: Manual on Uniform Traffic Control Devices

A listing of common questions received by our office may be found here: Frequently Asked Questions

- OSTA GIS Map

*IMPORTANT INFORMATION REGARDING TRAFFIC VOLUME INFORMATION DURING THE ONGOING COVID-19 PANDEMIC*

Regulatory Items

- Major Traffic Generators (MTG)

- Administrative Decision

- Certificate

- List of all Certificate and Administrative Decisions

- State Highway Passing Zones

- Traffic Control Signals

- Speed Limits

- Through Truck Prohibitions

State Traffic Administration Reviews

- Pending

- Completed (last 180 days)

Limited Access State Highways & Parkways

- Governing regulations for use thereof: Interactive & Printer Friendly

- Numbered Route Listing

- Merritt Parkway, Wilbur Cross Parkway, & Milford Parkway: Restricted Highway Information

- High Occupancy Vehicle (HOV) Lane Regulation

- Request to Film

Other Resources

- Local Traffic Authority List

- Guidance for Local Traffic Authorities

- Do Not Block Intersection Signs & Markings - State Highways *NEW*

- Requirements: Parkway Permits

- Requirements, information, and overview of Special Event Permiting

For further information, please contact:

Office of the State Traffic Administration
Connecticut Department of Transportation
2800 Berlin Turnpike
Newington, CT 06131

Phone: (860) 594-3020
Fax: (860) 594-2552
Email: DOT.OSTA@ct.gov

Please note that the State Traffic Administration is not involved in the following items. All questions regarding these items should be discussed with the appropriate party as noted.
"DOT Numbers"	Questions regarding DOT Numbers for commercial vehicles should be direct to the Connecticut Department of Motor Vehicles by visiting the Intrastate and Interstate DOT Numbers Website.
Driver Vehicle Examination Report Roadside Inspections or Weigh Stations	Questions should be directed to the Department of Motor Vehicle at (860) 263-5446 (or the telephone number indicated on the report).
Oversize/Overweight Permits	Questions should be directed to the Department of Transportation's Bureau of Highway Operations at (860) 594-2626 or by visiting the Oversize/Overweight Permit Website.
Traffic Violations (Tickets)	Questions regarding traffic tickets and the processing of traffic violations should be directed to the State of Connecticut Judicial Branch, Superior Court Operations Division - Centralized Infractions Bureau.