What is the maximum speed limit on Texas highways unless otherwise posted?

In Texas, the maximum speed limit on highways, unless otherwise posted, is 80 miles per hour. This higher speed limit reflects the design and conditions of many Texas highways, particularly in rural areas where traffic is lighter and the roadways are designed to accommodate higher speeds safely. It's important to observe any posted speed limits, as they can vary based on specific conditions such as construction, urban areas, or road type. In contrast, lower limits like 60 mph or 70 mph may apply to different types of roads or specific regions, but the general maximum for many highways throughout the state is indeed set at 80 mph.