AAA says pothole damage cost American drivers $15 billion over the last five years, an average of $3 billion annually. The auto club says during that time, about 16 million people had to fix their cars due to bad roads. AAA Michigan spokesperson Susan Hiltz tells WDET’s Pat Batcheller one repair bill can cost hundreds of dollars. She cited a study which found that it will take $170 billion dollars a year to significantly improve America’s roads and bridges. Click on the audio player to hear the conversation.