Proposal: Use tire-shredders to deter wrong-way drivers on Arizona highways

Proposal: Use tire-shredders to deter wrong-way drivers on Arizona highways

This wrong-way accident in April 2017 on northbound Interstate 17 in Phoenix killed three people.

PHOENIX — Saying warning signs and detection systems may not be the right answer, a state lawmaker has a more radical approach to stopping wrong-way drivers: slicing and dicing their tires.

Rep. Michelle Ugenti-Rita, R-Scottsdale, wants state transportation officials to identify highway stretches that have a high potential for people driving head-on into traffic. Her legislation, HB 2539, would mandate the installation of spikes “that shred the vehicle tires of any wrong-way driver.”

The proposal comes amid what appears to be an increasing number of motorists ending up on the wrong side of divided highways.

The Department of Public Safety reported this past June that it already had 740 reports that year of wrong-way drivers on Arizona freeways. And between 2004 and 2014, the most recent figures available, there were 245 wrong-way crashes resulting in 91 fatalities.

Gov. Doug Ducey made special mention of the issue in his State of the State speech in January, directing the state Department of Public Safety to put more troopers on highways during late-night hours to watch for wrong-way drivers and proposing stiffer penalties.

In the meantime, the Arizona Department of Transportation has erected large red-and-white signs on freeways informing drivers that if they’re reading those signs, they’re going the wrong way. It also installed an infrared detection system along 15 miles of Interstate 17 in Phoenix.

“I just don’t think they’re very practical and economical,” Ugenti-Rita said, citing a $3.7 million price tag for the system on that stretch of I-17.

“I’m looking at a more balanced approach,” she said.

“I think the spike controls are an option to be considered.”

The question remains as to whether they would do what they’re supposed to do.

A spokesman for ADOT said his agency takes no position on legislation.

But he noted that a 2015 study done for the state — the one that resulted in the decision on the infrared detection system — also looked at what other states have done.

A research analysis in Texas specifically examined spike strips, which are sharp barbs on springs that should fold over when a motorist is going in the right direction but remain rigid when encountering a tire rolling the wrong way.

The results were not promising.

One big issue is that these kinds of strips, often seen in places like parking lots to prevent people from leaving without paying, are generally designed to be used where people are driving very slowly, perhaps just 5 miles per hour.

Ugenti-Rita said that’s not necessarily a problem if the spikes are placed at locations like the top of exit ramps, where motorists are going slower. And she said she’s convinced that there has to be a company that could design a spike strip that will work at higher speeds.

The Texas study also found other problems. During testing, for example, the spikes sometimes broke.

That left stubs in the road that could damage the tires of even motorists going the right way.

Ugenti-Rita conceded that could raise some liability issues for the state.

“I’m not trying to be dismissive of those concerns,” she said. “I just think there are solutions for them.”

The Texas report also said that during testing, the spikes did not cause the tires to deflate quickly enough to prevent a vehicle from entering a freeway.

But Ugenti-Rita said spike strips are existing technology she believes can be adapted for use on freeway exit ramps.

It isn’t just in Arizona that the technology is being weighed.

In Ohio, for example, a spokesman for that state’s department of transportation has said the concept was dismissed last year after the agency concluded it would not work on freeway ramps.

No hearing has been set for the Arizona legislation.

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