Denver logged 94 traffic deaths in 2025, and the city had already recorded 36 more by mid-2026.1 Those deaths are not spread evenly across the map. Denver's Department of Transportation and Infrastructure (DOTI) calls the streets where the worst crashes concentrate the High Injury Network, and its Vision Zero Action Plan found that roughly 5 percent of the city's streets account for about half of all traffic deaths.23 If you drive here, the kind of crash you are most likely to be hurt in depends a lot on which road you are on.
Three crash shapes cause a large share of the serious injuries: the side-impact "T-bone" at an intersection, the head-on, and the rollover. Each has its own geography in and around Denver.
Where T-bone crashes cluster
Side-impact crashes happen where paths cross at an angle, which in a city means signalized intersections on wide, fast arterials. Denver's High Injury Network is built almost entirely from that kind of street. Federal Boulevard, East Colfax Avenue, Colorado Boulevard, West Alameda Avenue, Sheridan Boulevard, and Broadway all sit on the region's priority corridor list.4 These roads carry heavy traffic across many lanes, and a driver who runs a red light or turns left across oncoming traffic can put the side of one car in the path of another at full speed.
Federal Boulevard is the clearest example. It runs the length of the city through dense neighborhoods, and it has been Denver's most persistent safety problem for years. CDOT built a continuous raised median along about 2.5 miles of South Federal, from Alameda Avenue to Vassar Avenue, because controlling where cars can turn and cross cuts both the rate and the severity of crashes.5 The intersection of Federal and Alameda, where that project begins, is one of the corridor's known trouble spots.
Statewide, multiple-vehicle crashes killed 365 people in 2024, more than half of all Colorado traffic deaths.6 Speed is what turns a fender-tap into a hospital stay. Denver's own program says speeding is the single most important factor in whether a crash leaves someone dead or seriously hurt,2 which is why the city put speed-enforcement cameras on Federal and Alameda.
The head-on risk on I-25 and undivided roads
Head-on crashes are rarer than side-impacts but far more likely to kill, because the closing speed is the sum of both vehicles. In the Denver metro they show up in two very different places.
The first is Interstate 25 through downtown. CDOT operates a set of reversible, barrier-separated express lanes there, running about 12 miles between US 36 and 20th Street and switching direction depending on the time of day.7 Those barriers exist to keep opposing traffic apart, but wrong-way drivers still get in. In May 2026, a wrong-way driver entered the reversible HOV lanes near 20th Street and hit a Berthoud Fire lieutenant head-on; the wrong-way driver was killed and the firefighter suffered multiple fractures and a collapsed lung.8 Wrong-way head-on crashes have also happened where I-25 meets 6th Avenue.9
The second place is undivided arterials, where nothing but paint separates oncoming lanes. A raised median like the one on South Federal does double duty here, since a physical divider stops the crossover that causes a head-on the same way it stops the left-turn conflict that causes a T-bone.5
Rollovers happen at speed, and ejection is what kills
Rollovers are mostly a single-vehicle event. A driver leaves the road on a curve or a ramp, a tire catches, and a tall vehicle trips and turns over. Single-vehicle crashes accounted for 324 of Colorado's 689 traffic deaths in 2024, about 47 percent.6 Around Denver the risk lives on the high-speed facilities rather than the surface streets: the ramps and curves of I-25 and I-70, the beltways C-470 and E-470, Peña Boulevard out to the airport, and the climb up I-70 into the foothills west of the city.
What kills people in rollovers is usually ejection. When an occupant is thrown from the vehicle, the odds of survival drop sharply, and CDOT has spent years warning drivers that unbelted people are the ones who get thrown.10 Colorado's seat belt use sits around 88 percent, below the national rate, and that gap costs lives every year.11 If you drive the interstates and beltways at metro speeds, a seat belt is the one thing most likely to keep a rollover survivable.
What the metro numbers actually say
Zoom out to the nine-county Denver region and the scale is hard to ignore. The Denver Regional Council of Governments counted at least 1,564 traffic deaths and more than 9,500 serious injuries between 2020 and 2024, with fatalities up more than 30 percent across those five years.4 Statewide, CDOT recorded 701 deaths in 2025, up from 689 in 2024, with 392 of the 2025 deaths inside passenger vehicles and 235 tied to impaired driving.12 Through the first half of 2025, before a warm-weather spike late in the year, the state was actually running below 2024 (279 deaths versus 306).13
Several agencies track and respond to all of this. CDOT keeps the statewide crash dataset and runs the corridor safety projects.14 Denver's DOTI runs Vision Zero and the local street redesigns. The Denver Police Department and the Colorado State Patrol work the crashes themselves, and DRCOG coordinates safety planning across the metro with a stated goal of zero traffic deaths by 2040.4
If a crash like this happens to you
Call 911 and get a police report started, even if the other driver wants to handle it privately. In a T-bone or a rollover, injuries like concussions and internal bleeding can take hours to show up, so get checked by a doctor the same day and keep every record. Photograph the scene, including signals, skid marks, and lane markings, because the physical evidence is often what proves who had the right of way.
If someone was seriously hurt or killed, the legal and insurance questions get complicated fast, and it is worth talking to a lawyer who handles Colorado crash claims. You can start with the legal directory.
This article is general information, not legal advice.
Sources
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City and County of Denver, Vision Zero Statistics. https://www.denvergov.org/Government/Citywide-Programs-and-Initiatives/Vision-Zero/Statistics
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City and County of Denver, Vision Zero. https://www.denvergov.org/Government/Citywide-Programs-and-Initiatives/Vision-Zero
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City and County of Denver, Denver Vision Zero Action Plan (2022 update). https://www.denvergov.org/files/assets/public/v/5/vision-zero/documents/denver-vision-zero-action-plan.pdf
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Denver Regional Council of Governments, Regional Vision Zero. https://drcog.org/transportation-planning/planning-future/safety/regional-vision-zero
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Colorado Department of Transportation, South Federal Boulevard Raised Median Safety Project (April 2020). https://www.codot.gov/news/2020/april-2020/south-federal-boulevard-raised-median-safety-project
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Insurance Institute for Highway Safety, Fatality Facts: Colorado, 2024. https://www.iihs.org/topics/fatality-statistics/detail/state-by-state?state=colorado
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Colorado Department of Transportation, I-25 Central Express Lanes. https://www.codot.gov/programs/expresslanes/i-25-central-express-lanes
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Denver7, "Firefighter injured in head-on, wrong-way crash on I-25 in Denver." https://www.denver7.com/news/local-news/firefighter-injured-in-head-on-wrong-way-crash-on-i-25-in-denver
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CBS Colorado, "Wrong-way driver killed in head-on collision" (I-25 at 6th Avenue). https://www.cbsnews.com/colorado/news/wrong-way-crash-interstate-25-6th-avenue
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Colorado Department of Transportation, "CDOT Unveils Ejection Exhibits Showing Deadly Consequences of Not Buckling Up" (2015). https://www.codot.gov/news/2015-news-releases/08-2015/cdot-unveils-201cejection-exhibits201d-showing-deadly-consequences-of-not-buckling-up
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Colorado Department of Transportation, seat belt use study (September 2024). https://www.codot.gov/news/2024/september/seat-belt-study-showing-7-percent-usage-increase
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Colorado Department of Transportation, "Warm weather coincides with increase in traffic deaths in 2025" (January 2026). https://www.codot.gov/news/2026/january/increased-traffic-deaths-2025
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Colorado Department of Transportation, July 2025 Data Corner. https://www.codot.gov/safety/shift-into-safe-news/2025/july/july-2025-data-corner
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Colorado Department of Transportation, Crash Data. https://www.codot.gov/safety/traffic-safety/data-analysis/crash-data