Snow strangles Chattanooga roads; CARTA cancels service early

TDOT "holding its own" while Georgia and Alabama struggle

Snow begins pile up on Interstate 24, eastbound at the Tennessee state line at five o'clock Wednesday.

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photo Emergency personnel respond to a multi-vehicle pileup along Interstate 95 in Etna, Maine, about 20 miles west of Bangor, Wednesday, Feb. 25, 2015, in this photo provided by Maine State Police And Maine Emergency Management.

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* Signal Mountain cut off again as snow turns roads to slip-n-slides * Schools shut doors throughout region amid snowy onslaught * Snow begins to strangle Chattanooga roads; Jackson County declared "impassible * 70-vehicle pileup in snowy Maine leaves at least 17 injured * Tennessee's winter storm death toll hits 30 * Tennessee Gov.