Wrong way driving: how to prevent it and what to do if it happens
How to avoid wrong way mistakes and what to do if a wrong way driver approaches
It’s 1:30 a.m. on a quiet interstate. Far ahead, two headlights sit in your lane. They are growing fast. You have seconds, not minutes, to respond.
If you and the other car each travel 65 mph, you are closing at 130 mph, or about 190 feet every second. At that rate, a quarter mile gap disappears in about 7 seconds (our calculations).
Wrong way crashes are rare, but they are usually head on collisions, so they are often deadly [2]. From a traffic engineer’s view, checked against emergency response practice, this guide explains how these trips start and how to respond in either role.
Wrong way deaths are rising nationwide
FHWA defines a wrong way crash as one where a vehicle traveling against traffic on a high speed divided highway or ramp hits a vehicle going the right way. Crashes caused by a vehicle crossing the median are excluded [1].
By that definition, wrong way deaths climbed from 445 in 2018 to 704 in 2022 [1]. In 2022, roughly 1 in every 60 U.S. traffic deaths came from a wrong way crash (our calculation from FHWA data) [1].
Earlier studies agree: the NTSB counted about 360 deaths a year from 2004 to 2009 [4]. The AAA Foundation for Traffic Safety counted 3,885 deaths from 2010 to 2018, or about 430 a year [2]. The yearly average reached about 500 in 2015 to 2018 [3]. Because each group counted a little differently, compare the trends rather than the exact totals.
In the AAA Foundation data, about 4 in 10 people killed were riding in other vehicles, not with the wrong way driver [2].
Who drives the wrong way, and when
- Alcohol: The NTSB identified alcohol impairment as the primary cause of wrong way crashes [4]. In its 2004 to 2009 data, 60% of wrong way drivers had been drinking. Among those with known test results, 59% had a BAC of .15 or higher, compared with about 22% of all drivers in fatal crashes [4].
- Night and weekends: The NTSB found that 78% of fatal wrong way crashes happened between 6 p.m. and 6 a.m., including 31% between midnight and 3 a.m. [4]. Weekends were also overrepresented in the NTSB data [4]. Impaired driving follows the same clock, since 31% of drivers in fatal nighttime crashes in 2024 were alcohol impaired, versus 10% by day [11].
- Older age: Drivers over 70 made up nearly 15% of wrong way drivers but less than 3% of the right way drivers in the same crashes [4]. The AAA Foundation found the odds rise sharply after age 70 [2].
- Driving alone: Nearly 87% of wrong way drivers had no passenger [3]. A passenger can often say “that’s the exit ramp” in time.
Where these drivers end up matters to you, because most wrong way crashes happen in the lane closest to the median, your fast lane [4]. The NTSB suggests that a confused driver may believe the road is two way and keep to the “right,” which places them in that lane [4].
Our guides to alcohol impaired driving and older driver safety cover those risks in depth.
Common ways drivers end up going the wrong way
When investigators can tell where a wrong way trip began, the most common starting point is a driver turning into an exit ramp [4]. State research reviewed by the NTSB also points to interchange designs that make that mistake easier [4].
Comparison compiled by Safety Behind the Wheel Foundation
| Scenario | Why it fools drivers | Your defense |
|---|---|---|
| Exit ramp beside an entrance ramp | Loop ramps and partial interchanges can put the two side by side; partial interchanges have twice the wrong way entry rate [4] | Find the green entrance sign first |
| Exit ramp ending at a two way street | High wrong way entry rates; rounded corners invite a turn [4] | Look for red signs facing you |
| Missed exit, then a U-turn | Drivers turn around on the highway or at a median turnaround [4] | Take the next exit [12] |
| Left exits, short sight lines | Left exits have the highest entry rates; tight views hide cues [4] | Slow down and read every sign |
| Divided road crossings | Turning left too early puts you in the near lanes | Check for ONE WAY and DO NOT ENTER signs [5] |
| App prompts and work zones | A late prompt or shifted ramp misleads | Signs and cones outrank the screen |
The signs and markings that warn you
The Manual on Uniform Traffic Control Devices (MUTCD) sets national rules for signs and markings. Where an exit ramp meets a crossroad and a wrong turn is possible, it requires several layers of warning [5]:
- ONE WAY signs on the crossroad where the ramp meets it
- A DO NOT ENTER sign near the end of the ramp, facing anyone about to turn in, plus a WRONG WAY sign farther up the ramp
- Lane use arrows on the ramp, where its shape does not already discourage wrong turns (recommended rather than required)
Engineers can add more protection: after a study, DO NOT ENTER and WRONG WAY signs on a ramp may be mounted as low as 3 feet [5]. A 2006 MUTCD technical committee proposed this change so the signs would better match drivers’ sight lines and headlight beams [4]. Small red or white LED lights may also be built into the border or lettering, either lit all the time or switched on by a detector [5].
At night, pavement markers send the clearest signal. Red raised markers flag ramps and lanes that must not be entered from the direction in which they appear red [5]. Two way markers can show red to wrong way drivers and white to everyone else [5]. California’s handbook puts it simply: if road reflectors shine red in your headlights at night, you are going the wrong way [6].
The painted lines help, too, because on a one way ramp or highway the yellow line belongs on your left and the white line on your right [5, 12].
If any box fails, don’t turn in. Continue ahead or go around the block, then take a second, slower look.
Habits that keep you from making the mistake
- Preview tricky interchanges: Look over your route before night trips or visits to unfamiliar cities, as our guide to using GPS navigation safely explains. At the crossroad, slow down enough to read the ramp signs before you turn.
- Let signs overrule the app: If the voice says “turn right” but a DO NOT ENTER sign faces you, the sign wins.
- Never fix a missed exit with a U-turn: Pennsylvania’s manual says to take the next exit and calls crossing the median illegal and hazardous [12]. New York’s manual warns that backing up on a ramp is dangerous [13].
- Keep drinking and driving completely separate, because alcohol is the primary cause of these crashes [4].
- Use a copilot: On unfamiliar trips, ask a passenger to read the ramp signs out loud.
For families of older drivers: Take it seriously if a loved one ever enters a highway the wrong way or gets lost on a familiar route. Encourage a doctor’s visit and a professional driving evaluation. AAA and the NTSB have urged states to improve how they identify drivers who are at medical risk [3].
If you realize you're going the wrong way
The moment you notice red signs, red reflectors or headlights in your lane, your only goal is to stop being a hazard. Don’t speed up hoping to reach an exit, because every ramp on this side of the road is built for traffic going the other way.
- Ease off and warn others: Lift off the gas, brake smoothly, turn on your hazard lights and keep your headlights on.
- Leave the travel lanes by the shortest path: Steer onto the nearest shoulder without crossing traffic. In the lane next to the median, that shoulder is on your right. With no shoulder, stop as far to the side as you can.
- Stop and stay buckled: Remain in the vehicle unless there is smoke or fire.
- Call 911: Tell the dispatcher you are driving the wrong way, then give the highway, your direction and the last exit or mile marker you passed.
- Wait for help: Don’t turn around across the lanes or the median [12], because officers can stop traffic and guide you out.
We favor the median side shoulder because oncoming drivers are taught to steer away from a wrong way vehicle, usually to their right [7]. Stopping beside the median keeps you out of that escape path (our engineering reasoning).
If a wrong way car is coming at you
Our spot slow steer call routine builds on advice from the Arizona Department of Transportation (ADOT) [7]:
- Spot: Headlights in your lane, or a vehicle on the wrong side of the road, mean you need to act immediately.
- Slow: Ease off the gas, as ADOT advises, but avoid slamming on the brakes if someone is close behind you [7].
- Check and steer: Make sure no one is beside you, then steer away [7], usually to the right, since wrong way drivers tend to use the median lane [4, 7].
- Signal: A quick flash of your high beams or a tap of the horn may help. But never let it delay your move.
- Stop safely, then call: Get to a safe place, then call 911 and report the driver [7].
If an overhead message board warns of a wrong way vehicle ahead, ADOT says to move safely toward the nearest exit [7].
Our night driving guide has more tips for seeing hazards after dark.
Call 911 when it's safe, and give useful details
Your call may be the first alert police receive. Arizona built its detection systems partly so troopers would not have to rely only on 911 calls [9]. Where no such system exists, other drivers’ calls may be the only warning.
Make the call safely: a passenger should dial. If you are alone, pull off at a safe place first, as ADOT advises [7]. When you reach a dispatcher, give these four details:
- The highway and direction, such as “a wrong way driver in the northbound lanes of Interstate 10”
- The nearest exit or mile marker, and which lane the car is in
- The vehicle’s color and type, and whether its lights are on
- What you saw, such as high speed, swerving or a crash
Never try to stop the driver yourself
How highway agencies are fighting back with technology
Since early 2018, a $4 million detection system has watched 15 miles of Interstate 17 in Phoenix [8]. Its 90 thermal cameras cover the exit ramps and the freeway itself [8]. A detection flashes red lights on an illuminated WRONG WAY sign, alerts state troopers and posts warnings on overhead message boards [8, 9].
By late 2019, the system had detected more than 90 wrong way drivers. Nearly all of them turned around on the off ramp [8]. ADOT planned similar technology for Interstate 19 south of Tucson, with completion expected in winter 2025 to 2026 [9]. In 2024, Arkansas spent $13.5 million in Highway Safety Improvement Program funds on detection systems for 145 ramps [10].
If a WRONG WAY sign suddenly flashes red in front of you, a detector has probably spotted you. So stop and correct course right there.
Frequently asked questions
What should you do if you see a wrong way driver on the highway?
Ease off the gas, check that no one is beside you and steer away, usually to the right [4, 7]. From a safe place, call 911 with the location and direction [7].
What does it mean when the reflectors on a highway look red?
Red raised markers are aimed at drivers headed the wrong way [5]. So if reflectors shine red in your headlights, you are going the wrong way [6].
What should I do if I accidentally drive the wrong way?
Slow down, turn on your hazard lights and pull onto the nearest shoulder without crossing traffic, then call 911 and wait for help. Never make a U-turn or cross the median [12].
Why are wrong way drivers usually in the left lane?
A confused driver may believe the road is two way and keep to the right [4]. That places them in the lane next to the median, which is the fast lane for everyone else.
What time of day are wrong way crashes most likely to happen?
They cluster at night and on weekends. The NTSB found that 78% happened between 6 p.m. and 6 a.m. [4].
The bottom line
Recommendation from Safety Behind the Wheel Foundation
Before you turn onto any ramp, check that no red sign faces you and that the yellow line sits on your left. Late at night, favor the right lane and watch far ahead. If a wrong way vehicle appears, or you become one, get out of the travel lanes, stop and call 911.
Related articles
- Alcohol impaired driving: know the risks and plan a sober ride home
- Older driver safety: how to keep driving safely and confidently
- Merging and highway driving: how to enter, cruise and exit safely
- Using GPS navigation safely: plan the route, skip the sudden moves
- Night driving safety: how to see hazards and stop in time after dark
Sources and further reading
- 1Federal Highway Administration (FHWA). About Intersection Safety (section on wrong-way driving crashes, with fatality counts for 2018 to 2022). Last updated July 28, 2026. highways.dot.gov/safety/intersection-safety/about
- 2AAA Foundation for Traffic Safety (Villavicencio L, Añorve V, Arnold LS). Fatal Wrong-Way Crashes on Divided Highways (research brief). March 2021. aaafoundation.org/research/fatal-wrong-way-crashes-on-divided-highways
- 3AAA Newsroom. Heading the Wrong Way with “Wrong-Way” Driving (news release with NTSB). March 23, 2021. newsroom.aaa.com/2021/03/heading-the-wrong-way-with-wrong-way-driving
- 4National Transportation Safety Board (NTSB). Wrong-Way Driving. Highway Special Investigation Report NTSB/SIR-12/01. Adopted December 11, 2012. ntsb.gov/…/SIR1201.pdf
- 5Federal Highway Administration (FHWA). Manual on Uniform Traffic Control Devices, 11th Edition with Revision 1 (Sections 2A.12, 2B.46 to 2B.49, 3A.03, 3B.14 and 3B.24). December 2025. mutcd.fhwa.dot.gov/kno_11th_Editionr1.htm
- 6California Department of Motor Vehicles. California Driver’s Handbook, Section 7: Laws and Rules of the Road. Updated June 11, 2025. dmv.ca.gov/…/laws-and-rules-of-the-road
- 7Arizona Department of Transportation (ADOT). Wrong-Way Drivers. No date shown; accessed October 3, 2026. azdot.gov/about/transportation-safety/wrong-way-drivers
- 8Arizona Department of Transportation (ADOT). Wrong-way detection system receives national award (ADOT Blog). November 1, 2019. azdot.gov/adot-blog/wrong-way-detection-system-receives-national-award
- 9Arizona Department of Transportation (ADOT). ADOT’s I-19 technology upgrades will include wrong-way detection (news release). April 22, 2025. azdot.gov/news/adots-i-19-technology-upgrades-will-include-wrong-way-detection
- 10Federal Highway Administration (FHWA). The Highway Safety Improvement Program (HSIP) 2024: Always Innovating. FHWA-SA-25-030. Posted September 2026. highways.dot.gov/…/HSIP_IS_ALWAYS_INNOVATING.pdf
- 11National Highway Traffic Safety Administration (NHTSA). Traffic Safety Facts: Alcohol-Impaired Driving, 2024 Data. DOT HS 813 815. June 2026. crashstats.nhtsa.dot.gov/…/813815
- 12Pennsylvania Department of Transportation (PennDOT). Pennsylvania Driver’s Manual: Negotiating Highways and Interchanges. No date shown; accessed October 3, 2026. pa.gov/…/negotiating-highways-and-interchanges
- 13New York State Department of Motor Vehicles. Driver’s Manual, Chapter 10: Special Driving Conditions (Expressway Driving). No date shown; accessed October 3, 2026. dmv.ny.gov/…/chapter-10-special-driving-conditions
This article reflects the safety priorities of traffic operations, highway safety engineering and emergency response. It is general education, not legal, medical or professional advice for any individual. Laws, crash data and road designs change, so verify details with official sources. Reviewed October 2026.
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