• Sampled road/road edge at 50,000 points in the U.S.
• Identified common on-road/off-road combinations.
• Percentages of each on-road/off-road combination in terms of miles and car-miles.
• Feature distribution of visual appearance on the road margins
• The prevalence of these road edge conditions for actual roadway departure crashes.
• A database to store the generated results

A database was created to systematically store all results including images, videos, and other data. A user interface enabled the searching and analyzation needed information.