New Rules Establish Stringent Standards for Vehicle Speed Measurement Radar Equipment

The Ministry of Consumer Affairs, Food and Public Distribution (Department of Consumer Affairs) recently issued the Legal Metrology (General) Amendment Rules, 2025, a significant piece of delegated legislation. These rules were promulgated under the authority granted by sub-section (1) read with clauses (c), (f), (h), (i) and (s) of sub-section (2) of section 52 of the Legal Metrology Act, 2009 (1 of 2010). The primary reason for their enactment is to introduce comprehensive metrological standards and operational guidelines for radar equipment used in measuring vehicle speeds on roads, thereby amending the existing Legal Metrology (General) Rules, 2011. This amendment inserts a new Part X into the Eighth Schedule of the principal rules, specifically addressing "RADAR EQUIPMENT FOR MEASURING SPEED OF VEHICLES." The new rules are set to come into force on the 1st day of July, 2025.

The newly introduced Part X outlines detailed conditions for microwave Doppler radar equipment, commonly known as speed cameras or speed guns, ensuring their accuracy and reliability in traffic enforcement. It mandates that such radar equipment must be installed and operated strictly in accordance with approved instructions. A critical provision focuses on the certainty of vehicle identification, with the legislation providing: “The construction of the radar, including the internal logic of the measurement process, shall ensure that when the instrument is used in accordance with the instructions, an indicated speed shall not be attributed to the wrong vehicle even where vehicles are passing or overtaking or when the radar is mounted on a moving vehicle.” This aims to prevent erroneous speed attributions, a common concern in traffic violations. The rules further specify requirements for an aiming device to control the beam's angle of incidence, limiting relative measurement errors to not more than 0.5 degrees, and detail the radiation model of the antenna, including permissible angles for non-parallel beams. For radars without recording systems, the visual speed indication must remain visible and inhibit further measurements until manually cleared. If recording devices are used, they must capture the date, time, measured speed, vehicle's direction of travel, and sensitivity settings. For autonomous radars, a high confidence level of at least 99.8% is mandated to ensure errors remain within permissible limits, especially for unattended operations, often requiring redundant measurement techniques like taking multiple pictures. The rules also stipulate that speed indications must be inhibited if power voltage variations exceed limits that could lead to inaccurate readings, and require an overall function test device for self-checking.

The legislative intent behind these rules is to establish a robust framework for the design, construction, and operation of speed measurement radar equipment, thereby enhancing the fairness and accuracy of traffic enforcement. Prior to this amendment, specific, detailed metrological standards for such equipment within the Legal Metrology (General) Rules, 2011, were not as comprehensively defined, leading to potential gaps in ensuring the reliability of speed data. The new rules address these limitations by setting stringent construction standards, including requirements for indicators, mechanical strength, and resistance to extreme climatic conditions (e.g., operating temperature range of 0°C to 50°C, and dust/splash proofing). They also mandate rigorous testing for the reliability of electronic and logical components against disturbances like power line variations, electrical bursts, and external electromagnetic fields. The rules introduce detailed metrological field tests, requiring an operating test in actual traffic conditions and specifying error distribution parameters. For model approval, five hundred measurements must be made, with no positive error exceeding 3 kilometers per hour (or 3 percent at speeds above 100 kilometers per hour). Manufacturers are now obligated to submit details of the instrument's logic and seek approval for any changes to the approved model, with the Director (Legal Metrology) tasked with maintaining a secure storage system for this information. These provisions collectively aim to ensure that all radar equipment used for speed measurement adheres to precise metrological standards, fostering greater public trust in traffic enforcement mechanisms.

Keywords: Legal Metrology, Radar Equipment, Speed Measurement, Traffic Enforcement, Vehicle Speed, Amendment Rules, Consumer Affairs, India, Road Safety, Metrological Standards

Geo Tags: India
District: Not Applicable