MONTERREY, Mexico (AP) _ A Mexican truck drivers union launched a nationwide work stoppage Monday, with drivers lining their idle tractor trailers along some of the nation's major highways.

Officials of the National Confederation of Mexican Transportation Workers said drivers would stay off work until the government addresses truck registration fees, highway crime, the rising cost of diesel fuel and other concerns.

A spokeswoman for the Department of Communications and Transportation declined comment, saying a statement would be released late

Dozens of drivers parked empty trucks along a stretch of the Monterrey-Saltillo highway in the northern state of Nuevo Leon. There were no reports of traffic tie-ups or other problems.

Jose Omar Ortiz, president of the union's Nuevo Leon chapter, said drivers had halted their trucks along the highways in similar protests in Mexico City, Guadalajara, and San Luis Potosi.

``If there's a favorable resolution, we'll go back to work. If not, we will be here tomorrow,'' Ortiz said. ``This will go on indefinitely.''