Georeferencing West Virginia DOT s Roadside Assets: An Asset Inventory Case Study. Geoff Dew April 13,

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1 : An Asset Inventory Case Study Geoff Dew April 13, 2010

2 General Project Scope 17,817 miles collected across all systems. System Type Delivered Miles 1 Interstates US Routes WV Routes County Routes State Park & Forest Routes Federal Aid Non-State HARP Total 17, Pavement Distress including Roughness, Rutting, Faulting, Pavement Cracking, Road Geometry, GPS Data and Pavement Images. Roadside Asset Inventory

3 Roadside Asset Project Details Right of Way Images 3 HD camera setup facing (Forward 90 o, Right 53 o & Left Rear 53 o ) providing georeferenced images at a foot interval which translates to over 4.45 million images delivered for this project. Assets to be inventory include; Bridges, Guardrails, Intersections, Lane Widths, and Signs (standard & non-standard MUTCD signs; no private signs inventoried). Attributes to Collect Bridges Guardrails Intersections Lane Widths Signs Start & End Location Start & End Location Location Location Location Length Offset Intersection Type Width Offset Start & End Treatment Type Rail Type Post Type Condition Length # of Signs on Support MUTCD Name MUTCD Code MUTCD Category Sign Text Condition

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5 Data Collection

6 Distance Measuring Instrument (DMI) DMI utilizes a precision optical shaft encoder that is mounted on the left rear driving wheel. The DMI records 2,000 pulses per revolution. Accuracy is ±0.02% of the linear distance traveled. Ensures accurate low speed roughness measurements down to 20 km/h (12.5 mph).

7 GPS Data Trimble System Applanix POS LV (Position and Orientation System) GPS Data for every second of collection is stored on the ARAN Two antennas provide the vehicle heading

8 GPS Data Real Time GPS Data Collection to ensure proper collection and referencing. Inertial referencing system allows for fill in of lost GPS data. Post-processing of GPS can fill in to the of a second

9 Issues Weather / Late winter collection affecting small percentage of overall project total miles Remote collection on some one lane mountainous county routes GPS in remote areas Solutions Additional ARAN assignments, some re-scheduling and a little patience. Accepting a lower collection run rate on the County routes (ARAN can usually collect in the neighborhood of 60 miles per day, on this project they were in the range. ARAN subsystems and post processing greatly reduced these issues.

10 Asset Extraction

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21 Guardrail Delivery Table

22 State of West Virginia Ortho Imagery

23 Georeferencing West Virginia DOT s Roadside Assets 4,232 Bridges 40,063 Guardrails

24 33,638 Intersections 63,102 Lane Widths

25 222,823 Signs

26 363,858 Total Assets Delivered Assets Per Mile

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30 Net Results of Project Over 350,000 individual roadside assets delivered without having to risk the safety of any road crews being out in the field. Almost 18,000 miles processed in a small fraction of the time it would take manually. Can add or edit additional data fields such as updated asset images, conditions & attribute changes or even future work orders. Spatially delivered data, that is easy to use and can be imported into your various GIS or Asset Management Systems that provides the perfect base to your inventory. A great starting point to work from as you move forward managing and tracking these roadside assets.

31 Thank You! Stop by our booth for a further look or additional information.