The Minnesota Department of Transportation has tallied up the total statewide road salt usage for the winter driving season. It came in at more than 304,500 tons. That’s a marked increase from the year before, when 154,000 tons of salt was laid down in an unseasonably warm winter. It’s also 47% above the 5-year average. In western Minnesota they ran out of salt and had to import it from Mn/DOT districts in the state’s east. Mn/DOT says it spent a total of $90.5-million on labor, equipment and materials to keep clear the roads of snow and ice. That’s up from about $46-million the prior winter driving season. Mn/DOT maintains 12,000 miles of state highways.