Iowa will raise the default speed limit on most rural two-lane highways from 55 mph to 60 mph starting July 1.
The change comes through Senate File 378, signed by Governor Kim Reynolds on June 1.
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The legislation amends Iowa's default speed limit statute, raising the statewide default for vehicular traffic unless a different restriction is posted.
Officials expect travel speeds to stay close to current norms overall.
Sign Replacement Costs
According to the Iowa Department of Transportation, roughly 1,800 speed limit signs will need updating. The state estimates the cost at some $270,000.
Rather than replacing every sign immediately, the law allows agencies to use temporary overlays or stickers until signs can be replaced under normal maintenance schedules.
Insurance Impact Limited
The legislation includes another noteworthy provision.
Beginning July 1, the first two speeding violations in a 12-month period that are 10 mph or less over the posted limit generally cannot be used for certain licensing, insurance-rating, or policy-renewal decisions.
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This applies when violations occur in zones posted between 34 mph and 61 mph.
A driver cited for traveling 65 mph in a newly posted 60 mph zone could still get a ticket, but the violation may not carry the same long-term consequences for insurance premiums or driving record.
Officials Acknowledge Limits Outdated
Major Chris Smith with the Linn County Sheriff's Office told KCRG that stopping cars in speeding traffic creates more hazard.
"Sometimes allowing the public to drive a little bit faster makes it safer not only for them, but for us as well," he said.
At 60 mph, Iowa's rural highway speed limit still seems low compared to other states. Texas has at least one highway with a limit of 85 mph.
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Arizona is considering nixing speed limits altogether on rural highways during daylight hours.