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Holland's Portable Inspection Systems are a lightweight, plug-and-play track measurement technology deployed from a conventional tow hitch receiver. This feature eliminates the necessity of a dedicated hi-rail platform for the track measurement system; any available hi-rail platform with a hitch mount can be converted to an inspection vehicle. It can be operated by a single operator (weighs less than 50 pounds), deployed or removed within a minute, and stored and shipped with a luggage-size case. These systems can be folded up without disassembling from the hitch receiver and folded back down to return to track measurement without calibration. The GPS pole can also be folded down while traveling on the highway to the next job site. The company offers two different types of portable inspection systems: Gauge Inspector, which provides real-time gauge measurement; and Track Inspector, which provides full track geometry.