Cobra GPSM 5550 PRO GPS Navagation with 5-Inch Touch Screen, Truck-Specific Routing and AURA Camera and Driving Hazard Protection Aura camera and driving hazard protection alerts driver to speed and red light cameras as well as speed trps and dangerous intersections State Mileage and hours of services log keeps track of miles driven in each, off-duty, on-duty, and driving time Junction View Guides you to the correct lane to make it easy to navigate complex interchanges Enhanced truck-specific routing uses vehicle dimensions, weight, and configuration to plan the optimal route Truck-specific point of interest include all major travel centers with detailed amenity information.