The combination of a heavy snowstorm and heavy traffic slammed the Colorado DOT’s computer system on Nov. 30, the busiest travel day of the year. Motorists who tried to check road conditions on the state’s website, www.cotrip.org, found that it was shut down, according to The Gazette of Colorado Springs. The state normally has six computer servers to handle the web requests and added two more Sunday afternoon, but they were all overwhelmed by the number of visits to the site.