Indiana Weigh Station Enforcement: A Comprehensive Guide

Indiana actively enforces size and weight regulations for commercial vehicles to ensure road safety and infrastructure preservation. This guide provides a detailed overview of Indiana’s weigh station system, including enforcement methods, legal requirements and what drivers need to understand.

Size and Weight Enforcement in Indiana

The Indiana State Police (ISP) Commercial Vehicle Enforcement Division is primarily responsible for enforcing all size and weight laws within the state. This is achieved through a combination of fixed permanent scales and portable scales.

Permanent Weigh Stations

Indiana operates ten permanent weigh stations strategically located along its interstate system. These facilities collectively weigh approximately 1.5 million commercial vehicles annually.

Five of these permanent weigh stations utilize Weigh-in-Motion (WIM) scales. WIM technology weighs vehicles, measures axle spacing, and checks speed as they enter the scale area. This data is sent to a computer, which determines whether the vehicle should proceed through a bypass lane or be directed to a certified scale for further inspection. The PrePass system is also integrated with WIM technology to facilitate traffic flow.

Portable Weigh Stations

ISP patrol vehicles are equipped with portable scales to supplement the permanent stations. These portable units are used for accident reconstruction, requiring accurate weight data for each vehicle involved, and to assist other agencies upon request.

Scale Certification

Indiana Code IC 24-6-3-2 mandates that scales used for commercial purposes and enforcement be certified annually. However, the ISP adheres to a more stringent standard, having all enforcement scales certified by the Indiana State Department of Health every six months. The Indiana State Department of Health also certifies all instruments used by the division to measure vehicle dimensions.

Weigh Station Requirements by State

Generally, commercial vehicles with a Gross Vehicle Weight Rating (GVWR) exceeding 10,000 lbs are required to enter weigh stations. However, state-specific regulations vary.

• Alabama: Officers may require weighing of trucks or trailers using portable or stationary scales within a 5-mile distance.
• Alaska: Trucks exceeding 10,000 lbs must stop.

Personnel at Weigh Stations

The superintendent may assign qualified personnel, who are not necessarily state police officers, to supervise or operate both permanent and portable weigh stations.

Commercial Transactions and Weights & Measures

In Indiana, any commercial transaction based on weight, measure, or count is subject to regulatory oversight by Weights and Measures inspectors. These inspectors test and verify the accuracy of weighing and measuring devices.

Key Takeaways

• Indiana enforces strict size and weight regulations for commercial vehicles.
• Enforcement utilizes both permanent and portable weigh stations.
• WIM technology and PrePass systems are used to streamline the weighing process.
• Scales are certified every six months to ensure accuracy.
• State-specific regulations determine which vehicles must enter weigh stations.