Originally Posted by
drbenjamin
On topic, the other danger zone for black ice is any elevated structure (bridge etc). Radiative cooling can make a bridge surface be below freezing when the road around it is 35-37. I went down hard turning into such a bridge and nearly fractured my kneecap.
I am concerned about frost on the road -- Do I need studs for our nighttime November frost, or is that overkill? Forecast temp tonight @ commute time is about 35 deg. F, dewpt high 20s, windy, sky cover nil. Ground is far from frozen yet, heavy frost this morning, colder tonight than last. Am ordering studded tires and preparing the bike it's to go on, but neither are ready yet. Thanks for opinions/experiences. Sorry if this is hijacking-- Does the o.p.'s 'black ice' = frost?