A discussion of geospatial character of roadway vegetation roughness
The University of North Dakota Surface Transportation Weather Research Center has been a national leader in the development of traveler information systems in combination with North Dakota Department of Transportation, South Dakota Department of Transportation, and the Federal Highway Administration; its location within the upper Midwest offers an excellent opportunity for RGIS-Great Plains to assist rural America with traveler safety. Blowing snow models are currently being developed that would benefit greatly if detailed information on surface roughness and/or obstructions could be incorporated into the model.
This presentation will illustrate the work that has been done to improve the geospatial variability of roadway vegetation roughness (defined as the roughness associated with vegetation cover within a distance that affects the roadway conditions) used within a blowing snow model. It will highlight the need for an updated roughness categorization as well as examples of the updated categories within surface transportation weather research. The use of video mapping along a roadway will be discussed, as well as the process involved with building a GIS dataset from collected video.