The provided source material pertains exclusively to national and local traffic information resources in the United States, with a specific focus on road closure data. There is no information within the source data related to free samples, promotional offers, no-cost product trials, brand freebies, or mail-in sample programmes. Consequently, it is not possible to write an article on the requested topic using the supplied information.
Conclusion
The source documents contain details about the U.S. Federal Highway Administration's traffic information resources and specific road closures in Houston, Texas. No content is available regarding consumer freebies, sample programmes, or related promotional offers. Therefore, a factual article on the intended topic cannot be generated from the provided data.