Interstate 75 (I-75)
Interstate 75 runs about 1,786 miles from the Miami area (near Hialeah) north to Sault Ste. Marie, Michigan. It is one of the busiest north–south corridors in the eastern half of the country, connecting Florida's Gulf Coast, Georgia, and the industrial Midwest.
Route facts
| Designation | I-75 (Interstate 75) |
|---|---|
| Length | About 1,786 miles |
| Type | Mainline north–south Interstate |
| Endpoints | Miami area / Hialeah, FL (south) → Sault Ste. Marie, MI at the Canadian border (north) |
| States served | Florida, Georgia, Tennessee, Kentucky, Ohio, and Michigan (6 states) |
| Major metros | Tampa, Atlanta, Macon, Chattanooga, Knoxville, Lexington, Cincinnati, Dayton, Toledo, and Detroit |
Safety & known trouble spots
Unlike some corridors, I-75 does not carry a single dominant national "deadliest highway" label. Reporting on its risks tends to be localized to specific metro areas rather than the route as a whole.
In the Atlanta area, I-75 overlaps with I-85 to form the Downtown Connector, one of the most heavily traveled and closely watched stretches of urban freeway in the Southeast. High volumes, frequent merging, and closely spaced ramps through the city core are commonly cited as factors that concentrate conflicts there.
As always, crash counts and "most dangerous" descriptions from law firms, local news, and advocacy sources vary by year and methodology and should be read as public reports rather than official rankings.
The claims above are drawn from the public reports and third-party analyses linked in Sources. We include them for context, not as official or settled rankings.
Cities we cover on this corridor
Atlanta, GA
I-75 runs through Atlanta and joins I-85 to form the Downtown Connector through the city center.
View Atlanta coverage →Traffic alerts & real-time conditions
Georgia's 511GA system covers the Atlanta segment, including the Downtown Connector. Florida's FL511 covers the corridor's southern end near Tampa and Miami.
For live incidents, closures, and construction on your stretch, the official state 511 / DOT system is always the authoritative source. Our Atlanta hub links to the relevant local resources and recent reported incidents.
What to do if you crash on I-75
- Check for injuries and call 911 if anyone may be hurt or you are unsure.
- If vehicles are drivable and it's safe, move out of travel lanes to a shoulder and turn on hazard lights — interstate shoulders are dangerous, so stand well away from traffic.
- Exchange information and photograph documents, damage, and the scene.
- Give responders a factual account and get the report or incident number.
- Seek a medical evaluation even if you feel fine.
Sources
Stay ahead of incidents on your route
Get local road alerts for the city you drive most, and browse practical safety guides.