For as long as I can remember, the Dept of Public Works would use ground salt to melt the surrounding snow and ice during the winter season. It usually helps but the after-effect would be dealing with salt residues around which can be a challenge for both pedestrians and motorists.
Nowadays, I noticed that they use liquid salt which do not leave any salt residue around. Frankly, I find this less bothersome when I hit the streets. A great amount of ice and snow would have already melted and the roads and pavements would become quite passable as a result.
Kudos for whoever thought of this!