Sidewalks can be helpful for many reasons; they provide a place for pedestrians to walk off the streets, make paths for bicyclists and are safer for kids walking home from school. Unfortunately, if they aren't maintained, then slipping, tripping or falling on the sidewalk can cause serious harm to pedestrians. A broken or uneven sidewalk should be repaired. If it's not and causes you an injury, you may have a case.
There are several situations where you may be injured on a sidewalk. Maybe the surface was uneven, causing you to trip and fall. Maybe it was cold outside with snow and ice, and the person responsible for the walkway didn't take the time to clear it. You could have been riding your bike when dangerous cracks or holes in the sidewalk caused you to have a crash.