Can anyone tell me what’s the purpose?

There are painted barricades placed throughout the whole neighborhood of Woodlawn preventing access to the neighborhood. Can anyone care to explain the actual purpose? I was trying to find a potential house for rehabilitation work and I just can’t see the purpose. I mean these barricades are everywhere!!!!

There are painted barricades placed throughout the whole neighborhood of Woodlawn preventing access to the neighborhood. Can anyone care to explain the actual purpose? I was trying to find a potential house for rehabilitation work and I just can’t see the purpose. I mean these barricades are everywhere!!!!