Black Ice on New Hampshire Roads: Staying Safe and Knowing Who's Liable

What Makes Black Ice So Dangerous

Black ice is a thin, transparent layer of ice that blends into the pavement, making it nearly invisible until a vehicle is already sliding. It forms when temperatures hover near freezing and moisture — from snowmelt, fog, or a passing shower — refreezes on the road surface. In New Hampshire, it appears first on bridges, shaded curves, and overpasses, where the road loses heat from above and below.

Where It Forms First in New Hampshire

Drivers encounter black ice early and often on the I-89 and I-93 grades, the shaded stretches of Route 9 and Route 16, and the many rural bridges that cross the state's rivers. Mountain passes in the White Mountains and Monadnock region are especially treacherous because elevation and shade keep surfaces frozen even when valley roads are clear.

How to Drive on Icy Roads

Reduce speed well below the limit and increase your following distance dramatically. Avoid sudden braking, acceleration, or steering — smooth, gentle inputs help maintain traction. If you begin to slide, ease off the gas and steer in the direction you want the front of the car to go. Winter tires meaningfully improve grip and are worth the investment for New Hampshire winters.

Who Is Liable in a Black Ice Crash

Bad weather does not automatically excuse a driver. New Hampshire requires drivers to operate reasonably for the conditions, which means slowing down in ice and snow. A driver who was speeding, following too closely, or otherwise negligent can be liable even though ice contributed. Under the state's 51% comparative negligence rule, fault may be shared, and careful evidence-gathering at the scene helps establish who was truly responsible.