Prototype Demonstration of a Geographic Information System Application for211 Seasonal Analysis of Traffic Data, Development of Seasonal Factors and Seasonal 211 Adjustment of Roadways

摘要

The Traffic Survey Unit plans to establish a methodology in which it can assign211u001eeach Portable Traffic Counter (PTC) station a seasonal group profile through a 211u001emeans of statistical and geographical analysis. An ArcView Geographic Information 211u001eSystems application was programmed to allow the traffic survey sites to be 211u001eanalyzed by their spatial nature as well as by their statistical profiles. The 211u001eprogram offers a user-friendly GIS interface that can aid analysts with updating 211u001ethe current seasonal groupings for traffic survey points across North Carolina. 211u001eThe user is able to select a site and display an attribute table listing its 211u001ecurrent seasonal assignment, its new seasonal assignment based on the best 'best 211u001eguess' as determined by the statistical analysis, and all the 'best guesses' 211u001edetermined by that analysis. The user is also able to summon displays of the 211u001eseven Seasonal Profiles, and the graphs and charts produced by the statistical 211u001eanalysis. Finally, the user is able to update the new seasonal assignment based 211u001eon the results of the statistical analysis and its geographical proximity to the 211u001eother stations, highways, and municipalities.