On the heels of a snow squall Monday in parts of Baltimore, Harford and Carroll counties, Baltimore County launched a new online tool Friday to map and monitor snow plow routes to keep residents informed during severe snow events.

“By providing this information more efficiently, we can help the public better understand where we are working and do more to keep the public safe during storms," Baltimore County Executive Johnny Olszewski Jr. said in a statement.


The Snow Route Status Map color codes the status of Baltimore County roadways being salted and plowed during snowfall as:

  • Red - Salting and plowing not started
  • Yellow - Crews at work
  • Green - Operations complete
  • Gray - No county salting or plowing service available

The GIS mapping tracks progress on county roads maintained by the county Department of Public Works, which does not clear or salt state roads, private roads or alleys. Crews prioritize the clearing of main roads, then feeder roads, then community streets.

When less than 6 inches of snow falls, it takes around 24 hours for crews to plow all county roads, according information in the status map. If more than 6 inches of snow falls, it takes 48 hours for crews to plow all county roads. During heavier snowfall, the plows will concentrate on clearing the main roads.

Data for the Snow Route Status Map is provided by Public Works crew reports.