Neighbors have reported several shootings, including drive-bys, and residential streets being used as getaway routes. SEATTLE — The City of Seattle installed four concrete barriers on side streets near Aurora Avenue on Friday in what Mayor Katie Wilson’s office calls a “traffic calming treatment” to combat violence. The barriers replace homemade barriers installed by nearby residents after a series of incidents. Neighbors have reported several shootingsincluding drive-bys, and residential streets being used as getaway routes. This story continues below. “Gun violence along the Aurora corridor is alarming and unacceptable, and we share neighbors’ desire for immediate action…