Snow makes your car harder to control, increasing braking distance and making steering less precise. Additionally, snow can hide the lines, potentially masking ice patches and dangerous hazards. So, where should you drive when snow is covering the lines in the road? However, there are no specific federal rules in the U.S. Manual on Uniform Traffic Control Devices (MUTCD) that dictate where to drive when lane markings are obscured; the MUTCD only defines standards for markings when they are visible. Automotive Fleet, a national trade publication, makes a similar recommendation, saying that following snow tracks left by previous vehicles is generally a good idea.