Audit Rating Reporting Global Savings Transportation Audits all modes, around the world. Pre Audit, Post Audit & Software solutions. CT Logistics / Commercial Traffic (CT), established in 1923, is one of the largest U.S., and now with global offices, third-party service providers of freight bill audit, payment and transportation management consulting. Using the resources of FreitRater™, CT's proprietary freight rating and processing software, CT offers freight bill pre- and post-audit services, timely payment to each carrier, and customized management information to industrial shippers and receivers of freight. The cost for service is normally returned seven times!