E-Z STREET® CAR AMBULANCE - O Scale. Add streets and vehicles to your model train layout with E-Z Street Vehicles and Roadways. The E-Z Street™ modular system snaps together to create realistic one-lane or two-lane roads and intersections, adding a new dimension to your urban or city layout. Designed to work with O Scale layouts, the E-Z Street Vehicles are fully assembled and feature; Highly Detailed Painted Body with Precision Graphics (where applicable), Die-Cast Construction with Metal Wheels, Operates on 16" Diameter Curves or greater, O Scale 1:48- (runs on AC power 3-rail track).