Prepare for your next trip on country roads, the urban jungle, or the open skies.
Discover TexasDiscover key information that TxDOT collects on traffic safety, travel, bridges, etc. Study our various maps, dashboards, portals, and statistics.
Data and mapsLearn how to get started and find your next business opportunity.
Do businessBrowse projects in your area and find opportunities to get involved.
Explore projectsGetting around can be dangerous. Luckily, we have safety tips for all the ways you like to travel.
Stay safeStay up to date with the latest news and learn more about who we are.
About TxDOTResearch of sampling and testing rates for project tests listed in the current Design-Build Guide Schedule – May 2026 shows that the risk of either rejecting "good" material or accepting "bad" material ranges from 20% to 40%. Use this baseline for sampling and testing. The frequency of testing for high-variability materials should be increased for high-variability materials when testing results do not meet specifications.