Agenda - 11-24-2003-c2b - Laserfiche WebLink

Browse Search

A technical rationale was developed to differentiate the impacts of potential traffic generated by subdivisions of different lot counts and based on the type of road. Road widths and design configurations can accommodate varying amounts of traffic volume, so it is important to evaluate the relative impacts to a road system not based solely on lot count but also on the capacity/design of the adjacent road. Below are some examples of how traffic impacts can be equated on different roads and different size/scale subdivisions, The thresholds are objectively based on percentage traffic, increase to the total capacity of the road system. One must also understand that prior to total road capacity buildout, the road has actual lower traffic counts that, from a subjective standpoint, create a relatively higher percentage traffic increase in the interim. DAILY CAPACITY Rural Road Suburban Road Urban Road Subdivision Subdivision 2-lane (LOS `B') 2-lane (LOS `D') 3-lane (LOS `D') Size Traffic 4,000 12,000 16,000 (# of Lots) (Trips Per Day) % % % 20 200 5.0 1.7 1.3 40 400 10.0 3.3 2.5 80 800 20.0 6.7 5.0 The impact of projects in rural areas with over 5.0% traffic increase above total capacity comports to significant changes warranting the additional review through the subdivision and zoning process. Although Level of Service (LOS) `D' is commonly used as a benchmark far urban planning purposes, a LOS 'B' may be more appropriate in rural areas where maintaining rural character and safety far agricultural operations is of greater importance, The following provides a summary of the Articles/Sections of the County's Subdivision Regulations and Zoning Ordinance that will need to be amended to incorporate the proposed changes to the Growth Management System lot number thresholds. The attached table provides the existing and proposed thresholds. Subdivision Regulation Changes: Amend Section II (Definitions) and Section III-D-3 (Preliminary Plat Approval) of the Subdivision Regulations to require subdivisions with more than 20 lots in rural designated areas to follow a planned development/special use permit/zoning atlas amendment process. Specifics provided in attached Ordinance. Zoning Ordinance Changes: Amend Article 22 (Definitions), Article 4.1 (Establishment of Use Regulations), Article 4.3 (Permitted Use Table), and Article 6.29.4 (Additional Requirements for Certain Subdivisions) of the Zoning Ordinance to require subdivisions with more than 20 lots in rural designated areas to follow a planned development/special use permit/zoning atlas amendment process. Specifics provided in attached Ordinance, Process 1) Public Hearing to be held on November 24, 2003. 2) Planning Board to make recommendation to BOCC. 3) BOCC makes final decision G:\Comprehensive Plannin0 Div\GENE@003 Public HearingsWov 24\Subdivs of 20+ L°LS PDSL7PWbstract t 11203 doc