DOT Announces U.S.-Mexico Agreement on Cross-Border Trucking: Emphasizes Safety and Efficiencyby Emil EstafanousJuly 4, 2011Object reference not set to an instance of an object. JOIN OUR NEWSLETTER Thank you for subscribing. Something went wrong. I agree to have my personal information transfered to MailChimp ( more information ) Join over 3.000 visitors who are receiving our newsletter and learn how to optimize your blog for search engines, find free traffic, and monetize your website.We hate spam. Your email address will not be sold or shared with anyone else.