Pennsylvania State Police inspected nearly 1,600 commercial vehicles transporting hazardous materials and issued 790 citations during a one-day enforcement effort last week, Acting Commissioner Frank Noonan announced today.

Noonan said the initiative, known as the Commercial Motor Vehicle Safe Transportation of Placarded Substances detail, or S.T.O.P. S, was aimed at ensuring that trucks carrying hazardous materials are safe and do not present a danger to other motorists on Pennsylvania highways.

Noonan said state police motor carrier enforcement teams inspected 1,599 trucks on March 29.

"In addition to issuing citations, the teams placed 174 trucks and 43 drivers out of service and handed out 1,286 written warnings for vehicle and driver violations," Noonan said. "Unsafe brakes and record of duty infractions were the most common violations found during the detail."

State police issue issued citations and placed a number of vehicles and drivers out of service and issued written warnings.

* Troop L (Berks, Lebanon and Schuylkill counties), 86 inspections; five vehicles placed out of service; four drivers placed out of service; 36 citations; 71 written warnings.

* Troop M (Bucks, Lehigh and Northampton counties), 89 inspections; 12 vehicles placed out of service; three drivers placed out of service; 43 citations; 72 written warnings;

* Troop N (Carbon, Columbia, Monroe and part of Luzerne counties), 53 inspections; six vehicles placed out of service; four drivers placed out of service, 81 citations; 40 written warnings.

* Troop T (Pennsylvania Turnpike), 121 inspections; nine vehicles placed out of service; four drivers placed out of service; 61 citations; 83 written warnings.