VanJee designs the bar sensor based on digital strain gauge technology and develops specific interleaving sensor layout in WIM system to meet the weight enforcement accuracy requirement with ±2.5%. The sensor is not limited by roadway lanes width and it is flexible to install in any road position.VanJee bar sensor elastomer is only 3cm which means the sensor has small pressure area and has less amount of shape changing. Therefore, VanJee bar sensor has great competitive advantage on durability and lifespan.