About Sarnia Roads and Traffic Please use the Contact Us Form if you have any questions. The business of achieving and maintaining the highest standards around the […] Learn More Oversize/Overweight Loads Please refer to Oversize/Overweight Permit attachment for details regarding loads passing through the City of Sarnia. This file contains information […] Learn More Pothole, Sidewalk, Curb and Gutter Repairs Please use the Contact Us Form if you have any questions. Causes of Potholes Potholes are created when water penetrates the top […] Learn More Snow and Ice Removal Please use the Contact Us Form if you have any questions. The City of Sarnia clears City roads of snow, clears some […] Learn More Transportation Master Plan Please use the Contact Us Form if you have any questions. The Transportation Master Plan (TMP) is a long range citywide planning […] Learn More Traffic Calming The City of Sarnia must make improvements to address concerns such as speeding, excessive traffic volumes and traffic safety in certain areas. Learn More Roundabouts A roundabout is a type of circular intersection where traffic flows counterclockwise around a centre island. Vehicles entering the roundabout don’t necessarily need to stop, but must yield to traffic already in the roundabout and pedestrians. Learn More