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The Office of the State Traffic Administration (OSTA) sets standard rules of the road, also known as regulations, to make sure Connecticut roads are safe and in good condition for the traveling public. Staff work closely with the Local Traffic Authorities (LTA) in each town regarding the posting of signs, markings, and traffic signals on State highways and local roads.

OSTA operates under the authority of Section 14-298 of the Connecticut General Statutes and its Governing Regulations.

OSTA is responsible for ensuring the signs, markings, and traffic signals (traffic control devices) for the driving laws in Connecticut meet National standards.

The Federal Highway Administration (FHWA) sets the National standards for all traffic control devices. This means that drivers traveling from state to state will see the same messages along all highways, streets, and bikeways which reduces driver confusion and makes the roads safer for all users.

OSTA uses the Federal Highway Administration's Manual on Uniform Traffic Control Devices (MUTCD) as part of its practices to establish a uniform system of traffic control devices in Connecticut.