World-class brakes don't happen by accident. Meritor has invested millions of dollars in its air disc brake research and development program at its Cwmbran Wales manufacturing facility. Engineers gather data from 14 testing clusters to reveal areas for potential improvement. The in-lab testing is validated by field testing. The result is an air brake that deployed around the globe is dozens of different applications. Here's a glimpse of some of the testing Meritor employs.

- Photos by Equipment Editor Jim Park