Geometric Roadway Information
This site contains details of geometric parameters for most of the highways in the province of Alberta. This data was collected using vehicle-based Global Positioning System (GPS) equipment in conjunction with either satellite-based real-time or post-processed Differential (DGPS) corrections.
The calculated DGPS-based geometric parameter data reflect, and is limited by, the accuracy of the archived provincial highway network spatial data, which is then subject to the GPS hardware accuracy and error sources. Furthermore, horizontal curvature has been assumed to be "circular and tangent" in all cases rather than "circular, spiral and tangent". You data are strongly encouraged to read the Background Report prior to using the data.
Some documents on this site require Acrobat Reader 4.0 or better, available for free from Adobe.