Critical Area Plan 1979 - Laserfiche WebLink

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intensity, while the former determines the road improvements necessary to accommodate that development. Within the Critical Area, the traffic patterns have essentially been established, and major changes will not be proposed in this report. The individual streets and highways which comprise the transportation system within the CAR communities vary widely in their function. These functions require different standards of design and construction as the intended volumes and speeds of traffic increase or decrease. The Metropolitan Development Guides chapter on transportation establishes the following functional classification system for roadways. TABLE 8 FUNCTIONAL CLASSIFICATION SYSTEM CHARACTERISTICS FOR ROADWAYS Principal Intermediate Minor Arterial ArlerJal Arterial Collector Local I I I I I I I I I Sc,acing Location .Land Access Urban Rural Intersection Characteristics Parking Large trucks Management tools System Mileage 3-6 miles depending 1.3 miles depending 0.5-2.0 0.25-1.0 1 block on trip density, transit, on spacing of princJ- miles, miles. minor arterial spacing, pal arterials and minor & location of existing arterials, transit, trip facilities, density, and location of existing facilities. In natural community In natural community On edges of On edges or Within neigh- separations defining separations defining development within borhoods and development and not developments and not and neighbor- neighborhoods, other homo- separating it. separating it. hoods, genous land use areas, None. Major traffic Limited direct Some limitation on Direct generators, land access, direct land access, access. None. Freestanding Growth Commercial, Access to Direct land Centers and Rural industrial, and high- agricultural access. Town Centers. density residential uses with uses. No access to limits on single family use. Iow-density residential. Grade separaled Grade separated or Traffic sig- 4-way stops As required. (urban) or high high-capacity con- hals and and some capacity controlled trolled at-grade cross street traffic sig- at grade inter- intersections, stops, nals. Loop sections (rural). street stops. None. None. Restricted Restricted Unrestricted. as necessary, as necessary. No restriction. No restriction, Restricted as Restricted as Permitted as necessary, necessary necessary. Ramp metering, Ramp metering, traffic Traffic signal Continuity, number of Stop signs, traffic signal timing, signal timing, staging timing, land access lanes, traffic signal cut-de-sacs, no land access, of reconstruction, land spacing, preferential timing, land access, diverters. preferential treatment access spacing, treatment for transit, for transit, interchange spacing. Suggested federal upper limits for principal Suggested federal Suggested federal Suggested federal arterials and intermediate arterials combined: 'limitations/or limitations: Urban limitations: Urban Urban 10 per cent principal arterials, 5.10%, Rural 20-35% 65-80%. Rural 63-75% Rural 4 per cent intermediate arterials, and minor arterials combined: Urban 15-25%, Rural 6-12% 5O I I I I I I .I I I I