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DOT mark
DOT is the abbreviation of the United States Department of Transportation. The U.S. Department of Transportation was established in 1967, headquartered in Washington, D.C., with the Federal Highway Administration (FHWA), Federal Aviation Administration (FAA), Federal Motor Vehicle Safety Administration (FMCSA), Maritime Administration (MARAD), National Highway Traffic Safety Administration (NHTSA), Office of the Attorney General (OST) and other departments. There are 60,000 employees in the United States. Its duty is to develop and improve traffic and transport-related laws and regulations, make a series of regulations on all kinds of vehicles and dangerous goods entering the United States, issue certificates, etc. We are committed to maintaining traffic safety and promoting economic development to meet the needs of the environment and national defense.


History

The DOT certification system, the Federal Motor Vehicle Safety Standard (FMVSS), was enacted in 1968 by the National Highway Traffic Safety Administration (NHTSA) of the United States Department of Transportation to formulate/revise and implement the standards. DOT certification is mandatory, that is, all motor vehicles and accessories sold in the United States must pass DOT certification, with DOT logo. After more than 30 years of practical application, DOT certification has been gradually extended to the whole North America area from being implemented only in the United States at the beginning.


Present situation
Nowadays, in the eyes of North American consumers, the DOT code moulded on the sidewall is a label that promises quality, in other words, a quality assurance certificate issued by the tire manufacturer. Therefore, for the tire with DOT code on the market, the price is higher than that of the tire without DOT code. They take it for granted and are willing to accept it. In the eyes of manufacturers of motor vehicles and spare parts, DOT codes represent a responsibility to unconditionally meet all applicable provisions of the Federal Motor Vehicle Safety Standard (FMVSS) concerning Minimum Performance requirements and product identification requirements. In fact, DOT certification is a kind of market game rule, which embodies the commercial spirit of "free trade, responsibility and benefit sharing". Of course, for manufacturers of motor vehicles and spare parts, DOT certification is as important as the "knock-on brick" and "access permit" for products of motor vehicles and spare parts entering the North American market.。


Authentication and Detection Procedures
The United States Department of Transportation (DOT) clearly stipulates that any application for compliance with the Federal Motor Vehicle Safety Standards (FMVSS) submitted to DOT must be based on the manufacturer's understanding of OVSC laboratory testing procedures and production in accordance with DOT product safety specifications. That is to say, DOT specifies in detail the laboratory testing procedures, laboratory testing equipment, testing tolerances, product standard requirements, specific testing steps, and testing report requirements for each specification of motor vehicle and parts products. All manufacturers exporting motor vehicles and parts products to the United States must ensure that their products meet DOT laboratory testing procedures.


Authentication steps

The process of submitting a compliance application for Federal Motor Vehicle Safety Standards (FMVSS) to DOT includes the following steps

1. The manufacturer appoints a DOT application agent with permanent residence in the United States who will participate in all contacts with DOT in the conformity application process.

Submit agent appointment documents to DOT, agent approval documents, and application for compliance with Federal Motor Vehicle Safety Standards (FMVSS).

3. Select samples randomly and send them to DOT-approved contracted Laboratory for testing.

4 Laboratories submit specific product testing plans to OVSC of DOT and begin testing after approval.

If problems arise during testing, the laboratory will submit preliminary evaluation report and conformity survey report to the manufacturer applying for testing, and provide suggestions for product improvement.

The manufacturer improves the product and sends the sample to be tested again until it passes the test finally.

7 OVSC and DOT approve the manufacturer's compliance application to allow the product to enter the U.S. market legally.

8 OVSC will conduct annual spot checks on motor vehicles and parts, verify the validity of DOT certification held by manufacturers, and ensure that products meet the minimum performance and labeling requirements specified in FMVSS standards.

Above is the general operation process of DOT certification and laboratory testing for motor vehicle and parts products. According to different product types and specifications, there will be differences in details of the application process. Welcome manufacturers to consult our DOT project engineers.


Significance
The significance of DOT logo is that the product with DOT abbreviation as symbol meets the main requirement of US. DOT directive (FMVSS MGP), and is used to confirm that the product has passed the test certificate of the corresponding test qualified/or manufacturer, and really becomes the pass for products to be allowed to enter North American market. Relevant laws and regulations require industrial products with DOT markings to be put on the market without DOT markings. Products that have entered the market with DOT markings shall not be sold on the market. If they find products that do not meet the safety requirements, they shall be ordered to recall them from the market. If they continue to violate the relevant provisions on DOT markings, they shall be forced to withdraw from the market with high fines.

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