The State Highway Administration says it is preparing for heavy rains and possible floods this weekend in Allegany and Garrett counties, where up to 2 feet of snow remains on the ground in many places.

The agency said its crews are working proactively to clear drainage facilities such as inlets, pipes and culverts. They will also be ready to erect signs warning of high water and to remove downed trees.

The SHA reminded motorists to expect flooding in low-lying areas and never to attempt to drive through standing water, where cars can be swept off  the roadway. It directed travelers to its web site, www.roads.maryland.gov,  for information on road conditions.