The City of Detroit’s Department of Public Works maintains 673 miles of major streets and 1884 miles of residential streets. During times of great snowfall — today, for instance — DPW utilizes a three-level system for snow removal during the winter weather.

Here’s how that system works and what residents should look out for:

Level 1: During Level 1, if there are three inches or less of snow and/or freezing rain, DPW crews will salt only on major thoroughfares.

Level 2: During Level 2, if there are three to six inches of snow and/or freezing rain, DPW crews will plow and/or salt on major thoroughfares only.