Existing Sidewalk shapefile Data

Hello, I am a graduate student at Texas A&M University. I need "Existing Sidewalk shapefile Data". I've got CIP sidewalk data, but the data do not contain all the sidewalks in Houston. (It looks just plan, not existing sidewalk) Do you have the existing sidewalk GIS file that contains two-line sidewalk(right side and left side are separated, not center line, not polyline)? And, actually I need the data before 2016 (2015 or 2014preferred). I hope you have the data and share it with me.

Additional Info

Creator default
Organization City of Houston Open Data
Created over 2 years ago
Closed over 2 years ago
Accepted Dataset None