A deadly truck crash in Illinois prompted the federal transportation department's inspector general to examine the effectiveness of a safety oversight program.
U.S. Sen. Dick Durbin, D-Ill., requested the audit of the Federal Motor Carrier Safety Administration program after the accident last year.
A fatigued truck driver crashed into emergency vehicles stopped for a truck pulled over on I-88 near Aurora. An Illinois Tollway worker was killed and a state trooper was injured.
The federal safety program is supposed to identify high-risk trucking operations and intervene.
However, a Chicago Tribune report found gaps.
The agency allegedly ordered -- but never followed through on -- an investigation into the carrier involved in the crash.
The truck driver violated hours-of-service requirements. He was sentenced to three years in prison.
