Semi trucks, or tractor-trailers, have been around for over a century. As technology and safety standards have improved, so has the maximum speed at which these large vehicles can travel. While the maximum speed of a semi truck varies by country, in the United States it is typically 65 miles per hour (mph).
The majority of states in the U.S. have set a maximum speed limit for semi trucks of 65 mph on major highways. Currently, only 10 states allow semi trucks to travel at higher speeds than that; these states include Maine, Montana, Nebraska, North Dakota, South Dakota, Texas, Utah, Vermont and Wyoming. In most of these states the limit is 70 mph but can be as high as 80 mph.
Despite the legal limit being 65 mph or higher in some states, many trucking companies impose their own limits that are lower than this. This is due to safety concerns as well as fuel efficiency; the faster a vehicle travels the more fuel it consumes.
Truckers and Speed Limits
The general consensus among truckers is that they should not exceed 55 mph unless conditions are favorable and traffic is light. Many truckers also feel that driving slower than this helps to reduce wear and tear on their vehicles and improves overall safety on the roads.
Advantages of Slower Speeds
Slower speeds have many advantages for both drivers and other road users. Slowing down increases reaction times which can help to avoid collisions caused by sudden braking or misjudging distances between vehicles. It also reduces fuel consumption which helps to reduce emissions from diesel engines.
Conclusion
The maximum speed of a semi truck in the United States is typically set at 65 mph on major highways. However many trucking companies impose lower limits than this due to safety concerns and fuel efficiency. Slower speeds have many benefits for both drivers and other road users including improved reaction times and reduced fuel consumption.
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