Wrong-way prevention is not decided nationally. It happens at state departments of transportation, in municipal traffic engineering offices, and in budget decisions about which interchanges get upgraded this year.
That is good news for anyone who wants to help, because the decision-makers are local and reachable in a way federal policy is not.
Report the specific interchange
Traffic engineers act on reports about specific locations, and those reports are more useful than general concern.
If you know an interchange where the ramps are confusing, where signage is obscured or faded, where lighting is inadequate, or where you have personally seen a near-miss — report it. Most state DOTs have a public reporting mechanism, and most municipalities take traffic safety complaints through their public works department.
Be concrete: the location, the direction of travel, the time of day, and what specifically was hard to read. "The signage at that exit is confusing at night when you are approaching from the south" is actionable. "That intersection is dangerous" is not.
Engineers genuinely use these. A location that generates repeated public reports moves up priority lists.
Show up where the budget is decided
Countermeasures are not expensive relative to most infrastructure. Wrong-way pavement arrows, red retroreflective markers, and lowered signage are inexpensive per ramp. Detection systems cost more but cover corridors.
The obstacle is rarely technology. It is that these projects compete with everything else for a finite budget, and they have no natural constituency — nobody advocates for a wrong-way sign the way they advocate for a new road or a repaved street.
Public comment periods, transportation board meetings, and municipal budget hearings are where those decisions happen, and they are chronically under-attended. A small number of people making a specific, informed request has disproportionate effect at that scale.
Share the one fact that matters
Most drivers do not know what to do when facing a wrong-way vehicle.
The answer is: move right, slow down, get off the road if you can, and call 911 once you are safe. Wrong-way drivers disproportionately travel in what is the fast lane for correct-direction traffic, which makes the right side the safer place to be.
That takes ten seconds to tell someone and it only helps if it is already in their head before they need it. Passing it on is genuinely one of the higher-leverage things an individual can do.
Prevent the upstream version
The most consistent factor in fatal wrong-way crashes is alcohol impairment. Research examining crashes from 2014 through 2023 identified alcohol-impaired drivers as one of the clearly elevated-risk groups.
Every intervention discussed on this site is downstream of a decision someone made earlier in the evening. Taking keys, arranging a ride, or being the person who says something prevents the entire chain rather than mitigating it.
That is unglamorous and it is more effective than any technology deployed afterward.
Support the technology work
Detection systems and in-vehicle alerting cost money to build and to keep running, and the running part is where safety technology usually dies — funded to launch, unfunded to maintain, quietly offline two years later.
NMWWD is a Phoenix-based nonprofit working on exactly this problem. We are rebuilding our alerting technology from the ground up with durability as a design requirement, because a safety app that is offline helps nobody.
If you build software, we are looking for developers. If you want to fund the work, that helps directly. And if you have an idea for reaching drivers we are not reaching, we would like to hear it.
Keep the perspective honest
Wrong-way crashes are a small share of traffic deaths. Anyone telling you otherwise is overstating it, and overstatement is how safety messages lose credibility.
What makes them worth focused attention is a specific combination: they are unusually lethal, they are rising — annual fatal wrong-way crashes on divided highways roughly doubled between 2014 and 2023 — and they are unusually preventable, because they begin at identifiable points under identifiable conditions.
That combination is where a small amount of well-directed effort produces real results. Which is the whole argument for doing this work at all.