Hey Ray! The Science Behind What Causes Bridges To Freeze First

PITTSBURGH (KDKA) — Bridges are great. They make getting from place to place easier, even with obstacles in the way.  Pittsburgh has many obstacles like river valleys and rivers, thus Pittsburgh has a lot of bridges.  446 of them!
With bridges, there are additional things to be alert for in colder weather, such as ice.
(Photo Credit: Ray Petelin)
Bridges are made of steel and concrete. Roadways, on their own, would heat up and cool down quickly, too, because those materials