It differs depending on where you live, but generally your city or municipality is in charge of clearing major roads of snow and ice. Cities usually prioritize main highways and emergency routes, then move on to neighborhoods. Homeowners and residents may end up waiting hours before their street is clear while the city works elsewhere.
Property owners are responsible for clearing snow off of sidewalks. Businesses must ensure all walkways adjacent to their properties are safe to walk on within 48 hours of a weather event. Homeowners are also required to keep their sidewalks clear.