What Will the New Semi Truck Speed Limit in Idaho Actually Do

One of the many new laws that went into effect on July 1st is the speed limit increase for semi-trucks on Idaho highways. It sounds like an awesome change that will make driving better for everyone, especially anyone who has ever been stuck behind a row of slow-moving trucks trying to make it up a hill or past each other.

But what does the new law actually mean, and will it make driving on Idaho highways better?

What Does the Semi Truck Speed Limit Increase in Idaho Actually Mean

Semi-trucks are now allowed to go 80 miles per hour on Idaho highways, the same speed limit as everyone else. No more 70 for the big guys as we zip by going (at least) 80 in our smaller vehicles. Or, will things remain the same for the majority of drivers?

According to the new law, big trucks can go faster because it will be safer for other vehicles. A smaller car going 80 on the highway approaching a semi-truck going 65 or 70 can mean disaster if the smaller car misjudges the timing or distance.

Many people have pointed out that just because the speed limit is higher does not mean trucking companies will allow their drivers to go faster. There are apparently several reasons that 80 miles per hour is not going to happen for many truckers. Some people have commented online that trucking companies will keep their drivers at the lower speed limit, even enforced with engine or tracking governors, to keep insurance costs down and to maintain the best fuel economy for the big rigs.

Faster does not always mean better when you’re trying to save fuel. 80 miles per hour may also not be an option for some trucks as they haul heavy loads or travel up and down Idaho mountains.

We may see some big trucks hitting the new speed limit at times, but there’s a good chance that the main difference you’ll see on Idaho highways will be the absence of the ‘Truck Speed Limit 70’ signs along the roads.

Do you think the speed limit increase is a good idea and that it will make our roads safer? We can’t stop all semi-involved accidents, but maybe the new law will help.

Each of these accidents in 2024 involved a semi-truck, and many of them were fatal crashes.