A speed tracker captured speeds of up to 55 miles per hour on pothole- and washboard-riddled County Road 24 and its subsections, prompting Ouray County Road and Bridge Supervisor Steven Calkins to try out speed bumps around sections of county roads 24C and 24D.

The speed of 85 percent of drivers tracked on the road was 43 mph. The Colorado Department of Transportation uses 85 percent of average speed as part of the criteria in considering what a speed limit should be. The speed limit on the count...