From this:

The news that Mexican trucks will be allowed to haul freight deeper into the United States drew an angry reaction Friday from labor leaders, safety advocates and members of Congress.

They said Mexico has substandard trucks and low-paid drivers that will threaten national security, cost thousands of jobs and endanger motorists on the northern side of the Mexican border.

..."This program will make trade with Mexico easier and keep our roads safe at the same time," Transportation Secretary Mary Peters said Friday. She announced details of the plan to let 100 Mexican trucking companies travel beyond the border area while she was in El Paso, Texas, at the Bridge of the Americas, which connects to Ciudad Juarez, Mexico.

She just "misspoke". If she wants to "keep our roads safe", she can work to prevent this. What she's trying to say is that the increased risk is both managed and worth it. Regarding the former, this program will probably be as well managed as other Bush programs, and regarding the latter someone is certainly standing to profit with this, and perhaps Leslie Miller of the AP should follow the money instead of just transcribing remarks.

According to the Transportation Department, U.S. inspectors will inspect every truck and interview drivers to make sure they can read and speak English. They'll examine trucks and check the licenses, insurance and driving records of the Mexican drivers. Inspectors will also verify that the trucking companies are insured by U.S.-licensed firms.

Expect there to be loopholes or those rules to be watered down or just not enforced.

National Transportation Safety Board member Debbie Hersman questioned how the U.S. could spare sending inspectors to Mexico when only a tiny percentage of the hundreds of thousands of U.S. truck companies are inspected every year...

...One-fourth of all U.S. trucks are taken off the road after random inspections because they're so unsafe, she said. An even higher percentage of Mexican trucks are taken off the road at Texas border crossings, she said.

The trucks will start to roll in 60 days, but when American trucks will be able to drive into Mexico is still being worked out (naturally). And, those Mexican trucks won't have "black boxes" like those on aircraft to make a record of the amount of time the driver's been on the road. Sen. Patty Murray (D-WA) - believe it or don't - has a hearing on this matter scheduled for March 8.