What is the maximum speed limit on interstate highways in Missouri?

In Missouri, the maximum speed limit on interstate highways is 70 mph. This limit is established to ensure that drivers can maintain a safe and efficient flow of traffic, particularly on high-speed thoroughfares where vehicles are designed to perform at higher speeds. The choice of 70 mph aligns with standards observed in many states, promoting uniformity in speed regulations which enhances overall road safety.

While lower speed limits, such as 55 mph and 65 mph, are more commonly found in urban areas or on smaller roads, interstate highways are built to accommodate faster travel, which is why the upper limit is set higher. A maximum speed limit that is too low on these highways could lead to congestion and increased risk of accidents. Therefore, adherence to a 70 mph limit supports both safety and the effective movement of traffic on interstate highways in Missouri.