Ice and Black Ice: Detection and Response
Ice is the most dangerous road surface condition for commercial vehicles because it reduces tire-road friction to a fraction of dry pavement values. Stopping distances on ice can be 10 times longer than on dry pavement. Black ice is particularly dangerous because it is nearly invisible — a thin, clear layer of ice that appears as wet pavement. Conditions that produce ice: temperature at or below 32°F with any moisture; shaded road sections that remain colder longer than sun-exposed sections; bridges and overpasses (air circulates above and below — they freeze before road surfaces); overnight temperature drops after afternoon rain. Warning signs of ice: vehicle feedback changes (steering feels lighter, rear of trailer shifts); other vehicles sliding or driving slowly; road spray from other vehicles disappears suddenly (ice has no spray). If you suspect ice: reduce speed significantly (25-35% reduction minimum), increase following distance to 7-10 seconds or more, avoid sudden steering inputs, and test traction gently in a controlled space if possible. On ice: brake slowly and gently with steady pressure — avoid pumping ABS brakes (ABS does the pumping automatically). Do not downshift abruptly (engine braking can cause jackknife on ice). If you begin to slide: steer toward the slide, accelerate gently to regain traction, and avoid overcorrecting.