County Road Sidewalk Inventory
The New Jersey Department of Transportation (NJDOT) received funding in 2006 from the Federal Highway Administration (FHWA) to collect
images of pedestrian and bicycle facilities along county designated routes in the State, including routes in the 500, 600, 700 and two-digit
series, to prioritize and implement county-wide bicycle and pedestrian improvements.
A vehicle equipped with a Global Positioning System (GPS) and four digital cameras was used to collect images along both directions of each
county route. Nearly eight million high-resolution digital photos along 13,200 miles were collected and used for the data extraction process
that located the pedestrian and bicycle facilities and compiled the data into a database. The extracted data and collected images required more
than 1,400 gigabytes (GB) of storage space.
The image collection, performed between July 2006 and August 2007, had data extracted and compiled for:
- Paths (sidewalks, shared use paths, and worn paths)
- Bicycle lanes and routes
- Curb ramps
- Pedestrian/bicycle related signage
- Pedestrian provisions at intersections, such as push-buttons and pedestrian signal heads
Using NJDOT’s Standard Route Identification (SRI) Linear Reference System, the County Road Sidewalk Inventory data
and images collected for the project were organized by county route number within each county. Other organizational factors in the information
- A Standard Route Identification (SRI) number and the mile point along each route was calculated and assigned to the data.
- A starting milepoint and an ending milepoint were calculated for linear facilities, such as shoulders or paths.
- A single milepoint was calculated for point facilities, such as signs and intersections.