The city sweeps its curbed streets every spring. This involves removing any left over sand from past now plowing events. The city also aims to sweep all city streets two other times throughout the summer.
Potholes are created in a number of ways. When water seeps into cracks on the road's surface and is combined with the vibration of traffic it causes the asphalt to fail. This is why there are more potholes after it rains. Potholes are also created when trucks and buses stress the roadway causing a movement of the subsurface. Once there is a weak spot, every car that travels over it worsens the problem, and eventually a section of the material will fail. The most common cause is the freeze/thaw cycle. The ice or snow melts during the day and fills the cracks with water. At night the water freezes and expands, popping the road surface.
The streets department repairs potholes and other roadway failures in order of priority. The goal is to respond to all potholes within 24 hours of being notified. The city does repair potholes year round as part of its street maintenance program.
Ramsey County is responsible for county roads and MNDot is responsible for state and interstate highways.