More than 200 car crashes were reported across Lexington, police said, after snow slickened roads late Saturday morning and into the afternoon.
There were some injuries but no fatalities, police said.
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"It caught everybody off-guard as far as their driving habits go," Lt. Garry Sennett said.
Police dispatch calls for non-injury wrecks and fender-benders were backed up for several hours.
State police said they handled crashes throughout much of the state, including wrecks that resulted in fatalities in Bell and Gallatin counties.
Mayor Jim Newberry's office said that areas such as downtown's heavily traveled hills and bridges had been treated with salt brine Friday and that more than 20 salt trucks as well as extra police and fire personnel had been deployed Saturday after the snow started causing problems.
About 11:30 a.m., it was reported that vehicles had trouble getting up the hill on South Upper Street between Vine and High streets. An hour later, the outbound lanes of North Broadway between Sixth and Seventh streets were blocked because of a wreck, a dispatcher confirmed. There were other reports of vehicles striking utility poles and fire hydrants.
Police called in extra traffic units, and the second shift reported for work early.