Iowa Speed Limits Jump From 55 MPH to 60 MPH In July

People driving on Iowa roadways will soon be able press that pedal a little closer to the metal. Governor Kim Reynolds has signed legislation that increases Iowa's default speed limit from 55 miles per hour to 60 miles per hour, with the change set to take effect on July 1st, 2026.

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The new law, Senate File 378, updates Iowa Code Section 321.285 and raises the default speed limit for vehicular traffic by five miles per hour. While the change may seem small, it will affect roads across the state that currently rely on Iowa's default speed limit rather than a separately posted speed limit.

Here's the thing, the law doesn't automatically increase speed limits everywhere. Many roadways already have speed limits established by state law or local authorities. Interstate highways will remain at 70 mph, many divided highways will stay at 65 mph, and residential, school, business, and suburban districts will continue to have their specific speed limit zones 20, 25, 35 and so on. The change primarily impacts rural highways and roadways where the default 55 mph limit will now be replaced. Drivers should continue to pay attention to posted speed limit signs. It's those signs that will still determine the legal speed on roads.

The legislation also includes a practical solution for updating speed limit signs. Rather than requiring agencies to immediately replace every affected sign, local and state transportation officials will be allowed to use DOT-approved overlays or stickers to temporarily update existing signs. Those temporary updates are allowed to remain in place until signs are replaced as part of normal maintenance. Basically, we're slapping a sticker on it and calling it good, until it's broke.

Supporters look to other states, as well as modern vehicles, improved road conditions, and current driving patterns. They contend that this higher speed limit is reasonable for many rural roads. Opponents have expressed concerns that higher speeds can increase the severity of crashes and potentially affect roadway safety.

I can see both sides of the argument. Most people I know already drive 3 to 5 mph over the posted limits, so it makes sense to raise the limit. However, what happens as those limits rise and people continue the habit of taking 3 to 5 mph more? Food for thought.

The law doesn't change Iowa's existing speeding penalties. Drivers who exceed posted speed limits will still face the same fines and enforcement measures currently in place. As July approaches, motorists should begin to watch for updated signage and remember that while the default limit is increasing to 60 mph, posted speed limits will continue to take precedence wherever they are displayed. So, keep it 55, at least until that sticker is placed.