CDOT’s maintenance program establishes a target letter grade it expects to achieve for snow and ice control each year. During the winter, CDOT maintenance workers complete surveys to grade their performance using established criteria based on the year’s budget. Higher grades are typically achieved during lower-cost, milder winters.

CDOT measures the overall performance of its maintenance program by assigning letter grades to nine program areas, such as Snow and Ice Removal, Roadway Striping, Sign and Signal Maintenance, and Rest Area Maintenance. The overall grade for maintenance reflects the performance of all nine areas.