Laserfiche WebLink
Image Placeholder <br />173TRANSPORTATION2040 COMPREHENSIVE PLAN UPDATE DRAFT Dec14-17 <br />for review only <br />DRAFT Dec14-17 <br />for review only <br />DRAFT Dec14-17 <br />for review only <br />Existing Roadway Capacity and <br />Safety <br />Roadway capacity and roadway safety are two key indicators of how <br />well the roadway system is meeting the City’s transportation needs� <br />The sections below provide information to better understand capacity <br />and safety issues within the City of Hugo� <br />Existing Roadway Capacity <br />A roadway’s capacity indicates how many vehicles may use a roadway <br />before it experiences congestion� Capacity is largely dependent upon <br />the number of lanes� Table 8-4 below lists planning-level thresholds <br />that indicate a roadway’s capacity� Additional variation (more or less <br />capacity) on an individual segment is influenced by a number of <br />factors including: amount of access, type of access, peak hour percent <br />of traffic, directional split of traffic, truck percent, opportunities to pass, <br />and amount of turning traffic, the availability of dedicated turn lanes, <br />parking availability, intersection spacing, signal timing and a variety of <br />other factors� <br />Table 8-4 Planning Level Roadway Capacity <br />Facility Type Daily Two-Way Volume <br />Lower Threshold Higher Threshold <br />Arterials <br />Two-lane undivided 10,000 12,000 <br />Two-lane divided or three-lane undivided 15,000 17,000 <br />Four-lane undivided 18,000 22,000 <br />Four-lane divided or five-lane undivided 28,000 32,000 <br />Freeways <br />Four-lane freeway 60,000 80,000 <br />Six-lane freeway 90,000 120,000 <br />Eight-lane freeway or higher Calculated on a segment by segment basis <br />Source: FHWA Highway Capacity Manual and WSB Experience from Previous Projects