June 1st, 2012
ROAD VIEW ROCK STARSPreserve Infrastructure, by Catherine Higgins.
By Catherine Higgins and Gary Kuhl
An innovative and robust data collection system will help UDOT take better care of assets associated with state roads.
The Mandli Road View’s decked out Hummer gets attention when it cruises through town. Some onlookers even have concerns about privacy. But the sophisticated gear mounted on the front and back of the vehicle does not spy on people; the equipment collects information about assets associated with roads. For UDOT, those assets include thousands of miles of pavement and thousands of bridges, overpasses, signs, barrier and guardrail.
Mandli Communications, Inc. recently displayed the vehicle for UDOT engineers from UDOT Traffic and Safety, Maintenance, Structures, Motor Carriers and Asset Management. The three UDOT departments are combining forces to collect asset data. UDOT engineers overseeing the project are not aware of any other departments of transportation that are collecting as much data in one pass as is occurring in Utah.
Data collection will be accomplished by using five integrated systems:
High definition LiDAR sends out bursts of light to measure the distance to an object. LiDAR can collect “over a million points per second” according to the vendor’s website. While other methods collect asset data like pavement condition every few feet, LiDAR creates a spatially accurate point cloud for a continuous accurate measurement of pavement and all surrounding roadway assets, including vertical clearance for the overpasses.
- Three HD cameras that record two hundred frames per mile will take a right-of-way inventory for a visual record of roads and associated assets. The photographs will allow users to take a virtual drive on any state route. The images will also be available for public view.
- A Laser Crack Measurement System will detect, measure and classify pavement cracks and wheel path rutting.
- An ARRB Hawkeye profiling system uses accelerometers and lasers to measure the profile of the road surface and from that data, will derive IRI, a measure of pavement smoothness.
- Together, a GPS system, Gyroscopic Aplanix and distance measuring system will Geo-reference all of the data and provide integration with UDOT mile posts. Additionally this data will provide GIS linework for each route, horizontal curve, elevation and grade data.
Mandli was selected to provide the services through a competitive selection process. Asset data collection will be colleced on entire state system including ramps and collectors, and will include the number of lane miles, surface areas including width of shoulders and medians, all signs, guardrail, cable barrier and rumble strips. After collection, the Utah Department of Technology Services and UDOT Engineering Technology Services will develop an integrated database for displaying, querying and analyzing assets on an easy to use desk top application.
Departments of transportation across the nation, including UDOT, have traditionally maintained stand-alone data bases for each asset category to track maintenance and inspection data. An integrated data base will help UDOT have a better understanding of the transportation system as a whole and make better use of funding, staffing and other resources used to care for state assets.