Snowmobile Permissive Indicates trails and use areas where snowmobiles are permitted to operate. Colors are green and black on white. Snowmobile Restricted Indicates trails and areas where snowmobiles are NOT permitted to operate. Colors are red and black on white. Stop STOP Indicates a significant hazard trail or road intersection. Snowmobiles MUST come to a complete stop and yield to cross-traffic before proceeding. Color is red and white. Stop Ahead Indicates that there is a stop sign 200 feet or more ahead. Probably the most important sign on a trail because it warns of a potentially hazardous situation ahead. Color is usually red and yellow. Object Marker (Hazard Marker) Identifies a fixed object at the side of the trail. Used any time the fixed object narrows the normal width of the trail such as bridge railings. The stripes slope down towards the trail. Slow SLOW Instructs riders to temporarily slow their vehicle. Can be used for change in direction, culverts, dips, etc. Color is usually black and yellow. 26