Case Study: Doyle Sims & Sons Trucking, Inc. achieves a 125-truck ELD fleet upgrade in two months with Zonar Systems

Doyle Sims & Sons Trucking, Inc. - Customer Case Study

Doyle Sims & Sons, a family-owned trucking company based in Thornton, CO, faced an impending ELD mandate with limited internal resources and just six months to comply. Because the company installs equipment and trains drivers in-house, they needed a way to upgrade their fleet one truck at a time without disrupting operations.

Zonar supplied Zonar Logs for ELD software updates, testing and training, guiding the logistics analyst through firmware and record updates, providing support documentation and driver safety videos. With Zonar’s hands-on assistance, Doyle Sims & Sons updated all 125 trucks—including vehicles based in South Carolina—in two months, well ahead of the deadline, and successfully trained their drivers.

Doyle Sims & Sons Trucking, Inc.

Sheena Brooks

Logistics Analyst