The truck driver shortage studied in long term perspective.
Analysis of Truck Driver Age Demographics Across Two Decades – Supply Chain 24/7 Paper.
Here is the actual study. ATA_Analysis_of_Truck_Driver_Age_Demographics
Here is a story on a similar topic by Tom Sanderson of Transplace. It is a summary of the study above with some of his views on fixes.
Aging Truck Driver Work Force – A Major Issue in Filling Demand & Empty Seats