To see a sidewalk on which you are walking, symbolizes the road one is taking while trying to achieve the goals. Probably you are taking the new way in your life. Consider that if the sidewalk is broken or cracked, then it shows the barriers and obstacles one will face while walking to the end of that road. Make some changes which can make that sidewalk easy to walk on.
Read more about dreaming of Sidewalk in other dream meanings interpretations.