Detail for Crossings on Curves This Blair Line HO Scale Curved Wood Grade Crossing is ready to install on your highway and road crossings. Similar to those found all over North America, laser-cut wood kits are detailed with laser-etched boards and bolt holes. Curved Wood Grade Crossings are available in a variety of radii to fit common layout curved track. Curved crossings will fit curves plus or minus 1′ of listed radius. See the entire line of Blair Line HO Scale wood grade crossings. This Blair Line 2-Lane Curved Laser-Cut Wood Grade Crossing is prototypically correct with a straight board arrangement. Each set includes two complete crossings with laser etched boards and nail holes. Parts are ready to paint or stain and install on your highway and road crossings. The crossing will fit curves with radius as shown. Also included are plastic shims to fit different rail heights.