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greatest percentage increases in h-affic volumes over the same four-year period occurred on County Road B at Snelling (60%), on Hamline at County road C (47%), and on County Road C at Long Lake Road (40%). Average daily traffic refers to total average daily vehicles passing through the roadway segment. The 2000 traffic volumes are shown in Figure Trans-7. In a community-wide survey conducted in 1990, residents of Roseville said traffic congestion was the number one problem in the City. In a subsequent series of focus group interviews conducted by the City of Roseville, as part of the Vista 2000 process involving over 400 residents, traffic congestion was again named the number one problem in the City. Roadway congestion is the result of travel demand exceeding roadway capacity. The capacity problem may be caused by deficiencies in an individual roadway or by an insufficient system of roads serving the area. An individual roadway without enough lanes to accommodate traffic demand or without separate turn lanes to allow turning traffic to move out of the through-traffic flow does not have adequate capacity. A system capacity problem is present when an insufficient number of arterial roads are present to support the regional and city roadway systems. The following are major congestion locations on the Roseville transportation network. The principal arterials of TH 36, 1-35W, TH 280 and TH 51 have congestion during both the morning and afternoon peak periods. TH 36 and TH 280 are considered highly congested metropolitan highways because their capacity is being exceeded four hours or more per day. Of these two, TH 36 is the most critical because of its prominence as the principal east-west traffic carrier across the length of the City. A corridor study of TH 36 by Mn/DOT is a logical next step to look at how the facility can best be upgraded. It will look at what types of improvements, such as HOV lanes, new bridge overpasses, and new geometrics to accommodate queuing at interchange ramp meters, will be necessary to accommodate future traffic. C. RaSED ALE The Rosedale Shopping Area presents a unique congestion problem in the City of Roseville. The area is a very important retail center for the City and the region. It does, however, generate a large amount of traffic which Roseville Comprehensive Plan - 2003 Update Transportation - Page 14 of 28