摘要: |
Though not new to weigh-in-motion (WiM) use for acquiring vehicle weights, Brazil has recently implemented changes to metrological standards and legislation that will lead to increased use of WiM. Faced with similar issues that weight enforcement officials experience in regions around the world, this forward-looking strategy aims to capture the benefits that WiM can offer the country's transportation infrastructure.In fact, "Brazil was one of the first countries in the world to use WiM", says Douglas Gaspareto, engineer and public agent with ANTT, Brazil's National Agency of Land Transport. ANTT is the federal agency responsible for regulating and supervising road transport of passengers and loads on federal highways and those operated by concessionaires in toll roads. Since the 1970s, strain gauge-based technology was used for screening for enforcement and subsequent weights on scales, he explains. The system is still used and the weighing is performed in two stages. First, a selective system separates vehicles that may be overweight. Second, the selected vehicles are weighed on low-speed axle scales with vehicle speeds between 5-12kph. |