PRINCETON, N.J. — As mobile phones with transportation apps become more common in truck cabs, carriers face a growing safety and compliance challenge — making sure that their drivers aren’t using the devices while they’re on the road.

One way for fleets to address distracted driving is to track drivers’ phone use so they can see who is a risk, Matthew Howard, CEO and co-founder of ZoomSafer, said May 17 at the ALK Transportation Technology summit here.

“We can manage this becaus...