Finance Secretary John Swinney told the
it was unrealistic to expect Scotland's roads to be kept open in all weather conditions on 14 December 2010.
Mr Swinney was standing in for the former Transport Minister Stewart Stevenson who resigned following the chaos caused by last week's severe snow storm.
He detailed the Scottish government's new six point plan to keep Scotland moving in the snow.
The plans include storing more grit on trunk roads for quicker access, adapting landscaping vehicles to clear snow, and the possibility of stacking HGVs to keep traffic moving.
Mr Swinney said employers must respect the travel advice and that people should not be fearful of losing their jobs because they can't get to work.
More severe weather would arrive on Wednesday night, the finance secretary told the committee and he assured the MSPs any information about the transport network would be made available as quickly as possible.