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AxlePass Weigh-in-Motion
WIM for DOT and Enforcement
TruckPass™ Weigh-in-Motion

What different kinds of weigh-in-motion scales are available?

Depending on an operation's need, there are different kinds of weigh-in-motion technology available.:

1. WIM for DOT or Enforcement. These scales are enabled to weigh at very high speeds to check truck weights for legal tolerance over the road. These are typically the most visible scales to the general public, as they are often located on the side of the freeway.

2. WIM for Checkweighing. These scales are enabled to weigh at slower speeds with higher accuracy. These axle scales are ideal for distribution centers, ports or other businesses that simply want to check the weight of their trucks for inventory tracking, confirming legal over-the-road weights or load planning.

3. WIM for Trade. Available in select countries, there is now WIM technology which can achieve legal-for-trade levels of accuracy. This means the solution can be used to buy and sell goods over the scale, while keeping vehicles in motion. This is ideal for operations which currently utilize a full-length static scale and deal with bottleneck issues and traffic delays regularly.

How does a weigh-in-motion scale work?

Weigh-in-motion systems include load cell platforms that weigh a tractor trailer at a particular location, such as a weigh station. These systems provide the ability to weigh a truck in motion in real-time.

Weigh-in-motion systems measure the per-axle weight and gross weight of vehicles as they travel at highway speed. This technology detects axle-spacing so that vehicles can be identified by class. It also records the vehicle’s speed. At the heart of the weigh-in-motion systems' technology is the IND9W lane controller. This controller performs all command and communication functions to acquire and communicate data from the roadway weight and vehicle-position sensors. Its high-speed A/D converter ensures important information is captured quickly and accurately.

Weigh-in-motion systems include load cell platforms that weigh a tractor trailer at a particular location, such as a weigh station. These systems provide the ability to weigh a truck in motion in real-time.

How often do trucks have to stop at weigh stations?

Local governments carry different laws pertaining to how often a truck must stop at a weigh station. Weigh-in-motion or WIM scales can make weigh-station operation more efficient by sorting out potential violators for static weighing and inspection while permitting vehicles of legal weight to continue without interruption. Virtual WIM installations on routes that bypass weigh stations can help to ensure that vehicle load regulations are enforced, while traffic planning systems use WIM technology to monitor traffic. To avoid any legal ramifications, check local laws. To install WIM scales in your region, contact METTLER TOLEDO.

What trucks must stop at weigh stations?

Local laws regulate which trucks must stop at weigh stations. When weighing is required, weigh-in-motion or WIM scales can make weigh-station operation more efficient. These specialized scales allow operators to sort out potential violators for static weighing and inspection, while trucks of legal weight continue without stopping. Virtual WIM installations that bypass weighing stations altogether can help ensure that load regulations are enforced, while WIM technology allows traffic planners to closely monitor traffic. To avoid any legal issues, check local laws in the areas you operate in. To have WIM scales installed in your area, contact your METTLER TOLEDO representative.

What happens if you don't stop at weigh stations?

Local governments keep different laws on the books with regards to vehicles that don't stop at a weigh station. To avoid legal issues, review your local laws. WIM scales—also known as weigh-in-motion scales—make weigh-station processing more efficient. Potential violators can be sorted out for further inspection and static weighing, while vehicles of legal weight are able to continue without interruption. Virtual installations on routes bypassing weigh stations help to ensure that regulations regarding load weight are met. Traffic planners can also use WIM technology for traffic monitoring. To install WIM scales, contact METTLER TOLEDO.

What are the benefits of weighing trucks in-motion?

Weighing trucks in-motion compared to static has several benefits, including increased efficiency, improved safety, and reduced wear and tear on the weighing equipment. In addition, if an operation currently does not capture vehicle weights, installing a weigh-in-motion solution is a good way to seamlessly improve product tracking and ensure legal roadway compliance.