What Causes Muddy Driveways Muddy driveways are a common problem during January and the rest of winter, especially as snow melts and rain mixes with frozen ground. Heavy rain and poor drainage allow water to soak into the surface. Over time, repeated use by cars and trucks pushes water deeper, breaking down gravel or soil and leaving soft, muddy areas. Driveways without strong base support or good drainage are more likely to develop ruts and standing water. Once this starts,