Dorset County Council has begun stockpiling salt stocks ahead of winter after a shortage last year caused some authorities to run out.
Roads in the county are to be salted overnight for the first time since the end of last winter as temperatures are expected to dip below freezing.
The council said it would be increasing salt stocks by 20% to 12,000 tonnes this year.
The increased stocks will provide more resilience to a prolonged cold snap.
In addition to the extra stocks, the council has reviewed which roads will be salted, to reflect current road use.
Roads to be treated will include routes to urban schools with more than 500 pupils and rural schools with more than 350 pupils.
Main routes through parishes with more than 750 residents will also be gritted.
A spokesman said: "The council has made some significant improvements to its winter road service this year following lessons learned from the previous two severe winters."