ECE Regulation No. 61 sets forth the uniform provisions concerning the approval of commercial vehicles with regard to their external projections. This regulation is crucial for ensuring that the external parts of commercial vehicles do not pose unnecessary risks to other road users, such as pedestrians and cyclists. It aims to enhance road safety by minimizing the potential for injury caused by protruding parts on vehicles.

The regulation specifies technical standards for the design, construction, and performance of external projections on commercial vehicles. These standards ensure that external projections, such as handles, mirrors, and other attachments, are designed and installed in a way that minimizes the risk of injury in the event of a collision. The regulation mandates that these projections must be tested under various conditions to ensure they meet the required safety performance criteria.

Testing procedures are rigorously defined to ensure compliance with the regulation. These tests include assessments of the shape, size, and placement of external projections to ensure they do not pose a hazard. The tests also evaluate the strength and durability of these projections to ensure they remain safe throughout the vehicle's lifetime.

The TAT Lab in Iran is authorized to perform testing and certification for compliance with ECE Regulation No. 61. This includes conducting all necessary tests to ensure that external projections on commercial vehicles meet the specified standards for safety, performance, and durability. TAT Lab utilizes advanced testing equipment and methodologies to perform these tests accurately and efficiently. By performing these tests, TAT Lab helps enhance road safety in Iran by ensuring that commercial vehicles are designed and constructed to minimize the risk of injury from external projections.