<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by TBarrow:
because of bridges. They freeze first as the air passes under because the don't have a soil base for insulation as normal roads.
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You are correct, bridges do freeze first but it's still impossible from even a bridge to to get ice on it if the actual temp hasn't reached the freezing point of 32F.
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