In 2020, Stericycle made significant improvements to its Regulated Waste Compliance Services and Secure Information Destruction collection routes in North America to increase efficiency and decrease miles driven. We identified duplicated movements to the same areas on multiple days of the week and reassessed the frequencies of collections required in each service territory, enabling us to reduce repetitive routes. Through these efforts we estimate improved efficiency of our collection routes for 290 of our North American facilities, a reduction of an estimated 909,400 miles and 113,675 gallons of diesel fuel consumed annually. Our route consolidation efforts decreased our greenhouse gas emissions by 1,170 metric tons annually.
Additionally, over the last three years we have expanded our Shred-it fleet of mobile collection vehicles across the U.S. As of year-end 2020, we had approximately 210 of these specially designed, oversized cargo vans on the road. The mobile collection vehicles securely store loose paper, enabling them to have a capacity equal to that of a box truck that transports documents stored in plastic containers. Their smaller size means improved fuel efficiency, which means lower greenhouse gas emissions.