The United States has 4.09 million miles of roadways, from multi-lane interstates to narrow mountain passes. While most roads are safe to drive on, there are some that present unique hazards and have earned a reputation for being particularly dangerous. Here are some of the most perilous roads and highways in the US:

Florida State Road A1A - Florida
Running along the Atlantic Ocean and Intracoastal Waterway, A1A seems like a picturesque drive except for its reputation for deadly head-on collisions, with the intersection between A1A and Las Olas Blvd one of the most dangerous in South Florida. Sections of the road are very narrow, with only a double yellow line dividing oncoming traffic at 55 mph speeds. The proximity to water leaves little room for error.

While many roads are larger and busier, these routes contain additional risk factors like elevation, terrain, and design flaws that contribute to higher rates of accidents. Sagi Shaked, a Miami car accident lawyer at Shaked Law, suggests that drivers should be alert and avoid these roadways altogether during risky conditions like snow, rain, and ice. Caution and defensive driving can help prevent you from motor vehicle accidents and become another statistic on one of America’s most treacherous byways.

Tail of the Dragon - Deals Gap, North Carolina
This 11-mile stretch of US 129 in the Great Smoky Mountains is known for its 318 curves along the highway as it winds through the mountains. The challenging road draws motorsports enthusiasts, but with the high volume of sharp turns, drivers must be extremely cautious.

Going-to-the-Sun Road - Glacier National Park, Montana
Built in 1932, this narrow 50-mile road rises to over 6,000 feet in elevation and crosses the Continental Divide in Montana’s Glacier National Park. Sections are only 16 feet wide with no guardrails and steep drop-offs. The scenic but treacherous route is usually only open from June to October due to heavy snow. Watch for rockslides, wildlife crossings, and icy conditions. If you drive non-stop, it will take two hours to complete the distance.

California State Route 138 - Southern California
Highway 138 connects Interstate 15 to Pearblossom Highway in Southern California, but a 25-mile stretch leading to Palmdale in the San Gabriel Mountains features sheer 2,000 foot cliffs on each side. The rollercoaster-like road twists and turns without guardrails. Weather like rain or snow can make conditions very hazardous with little room for error, with accidents a real risk.

Kolob Fingers Road - Zion National Park, Utah
This 5-mile gravel road with a 10% grade doesn’t seem that intimidating until you realize it hugs the side of a 1,000 foot cliff with no guardrails. Sections are just wide enough for one car and you may have to negotiate yielding to oncoming vehicles. Be extremely cautious of steep slopes and watch for falling rocks.

U.S. Route 431 - Alabama
Also known as “Slaughter Road,” this highway runs through some of the most dangerous terrain in Alabama – it was once ranked as the 4th deadliest road in the US. It’s known for high rates of fatal accidents due to its risky curves and long stretches of remote highway. Drivers should be prepared for dangerous conditions and drunken drivers, as there is little enforcement.