Road-Rail vehicle UNIROLLER 4X4 is universal Road-Rail vehicle, which can be equipped with various superstructures – loading platform, hydraulic loading crane, water sprinkler, sprayer, mobile workshop, rescue vehicle equipped with re-railing equipment, working platform, etc. Vehicle can be equipped with frame for quick exchange of superstructures using stabilizers. UniRoller 4×4 can be quickly on and off-tracked for maintenance work on and off railway tracks, with various superstructures and low operation and service costs. Power transmission on rails is effected by means of road tyres via drums. This drive system provides Road-Rail vehicle without contact of the tyres with the rails (undemanding solution) at a reasonable price. Two-wheel rail gears are installed behind the road axles. CCTV cam system for reverse ride, as well as railway lights and lights for night work can be delivered optionally. All operations on rails are controlled electrically from the driver’s cab or along the vehicle sides. Reversible gearbox enables constant forward and reverse speed on rails.