Rostra Precision Controls, Inc. Certified - ISO9001: 2000 RearSentry ? Obstacle Sensing System for Medium Duty Trucks, Heavy Duty Trucks/Trailers. Click here to calculate the ROI for your fleet. ROSS ? Rostra Obstacle Sensing System Like an extra set of eyes, the Rostra Obstacle Sensing System detects objects that you can't. ParkPilot ? Parking Aide "State-of-the-art" parking aide that uses ultrasonic technology to warn drivers when objects are detected as a vehicle backs into parking spots! SDS ? Student Detection System Detection Systems for School Bus Industry. Comfort Seat? Lumba