Update dataset description.

README.md

@@ -130,4 +130,11 @@ configs:
 
 ### Fixed Obstructions on Sidewalks (NYC Combined) Dataset
 
+A unified dataset combining NYC’s fixed infrastructure layers relevant to pedestrian and bicycle mobility:
+  1) Mobile Telecommunications Franchise Poles — locations of street light poles, traffic light poles, and utility poles reserved for telecommunications installations,
+  2) Street Sign Work Orders — locations of regulatory, warning, guide, and parking signs managed by NYC DOT,
+  3) NYC Planimetric Sidewalks — official polygon geometries of NYC sidewalks.
+     
+These datasets support spatial analysis of pedestrian infrastructure, sidewalk obstruction studies, accessibility assessments, and micro-mobility planning. All records are georeferenced with accurate coordinates or geometries suitable for spatial overlay, proximity analysis, and visualization.
+
 More information about how this dataset was generated can be found [here](https://github.com/VIDA-NYU/OSCUR-data/pull/13).