Tolling Overweight Vehicles on Highways Rod Klashinsky, International Road Dynamics, Inc.

Rationale for WIM Importance of WIM Wear and tear on pavements, bridge structures, and other components of the transportation infrastructure caused by an individual vehicle is directly proportional to the weight of that vehicle or axle. As gross vehicle and axle weights increase, the damage to highway and bridge infrastructure increases exponentially. Bending Plate Single Load Cell Slow Speed WIM Scale Lineas ® Quartz Sensor Piezoelectric Sensor

Strategies Strategies Charging by Weight and Penalizing Overloading 3 Options for Weighing and Classifying Vehicles: Static Weigh Stations –Slow throughput –Large infrastructure investment –Safety hazard High-speed WIM Lanes (Roads or Toll Way) –Least intrusive –Requires identification of all heavy vehicles at highway speeds Low-speed WIM Lanes at Toll Plazas –Using Electronic Toll Collection (ETC), most vehicles can be processed without stopping –Allows for manual collection from vehicles not subscribed to ETC. China Results with Bending Plate for WIM have proven that it is possible to achieve accuracies of at least ± 4% at 90% confidence levels. KoreaBending plate for WIM IndiaSlow Speed WIM (SSWIM) scale solution on the two exterior extra wide lanes in toll plazas.

Weigh Stations Ramp Sorter Systems Automated Mainline Weigh Stations Remote Controlled Weigh Stations Virtual Weigh Stations Portable WIM Solutions Typical Ramp Sorter