The Wirtgen Performance Tracker (WPT) is a real asset for any milling contractor: The job-site measurement system uses a laser scanner to measure the cross-sectional profile to be milled, while surface milling performance and milling volume can be determined precisely thanks to GPS positioning and other sensors. The WPT then generates a report, detailing the daily milling output, including consumption data, a precise site plan and other relevant information. Additionally, the operator can conven