MUTCD= Manual on uniform Traffic Control Devices China has now no such manual to follow Signs -- to regulate, warn or guide traffic Markings-- to channelize(渠化) traffic by painting or delineating(划线) on the surface of road Signals - to direct and warn traffic
• MUTCD = Manual on Uniform Traffic Control Devices China has now no such manual to follow • Signs --- to regulate, warn or guide traffic • Markings --- to channelize （渠化） traffic by painting or delineating （划线）on the surface of road • Signals --- to direct and warn traffic
Chapter 3. Volume, Density speed Studies and characteristics Volume (rate of flow)- intensity of traffic flow Speed -- motion condition Density -- distribution of traffic flow over space Relationship among three elements -- models
Chapter 3. Volume, Density & Speed Studies and Characteristics • Volume (rate of flow) --- intensity of traffic flow • Speed --- motion condition • Density --- distribution of traffic flow over space • Relationship among three elements --- models
Volume AADT( Average annual Daily Traffic年平均日交 通量) AAWT( average Annual Weekday Traffic年平均 周日交通量) ADT( verage Daily Traffic平均日交通量) AWT( Average Weekday Traffic平均周日交通量) Hourly volumes and peak hour volume(小时流 量,髙峰小时流量)
Volume • AADT (Average Annual Daily Traffic 年平均日交 通量) • AAWT (Average Annual Weekday Traffic 年平均 周日交通量) • ADT (Average Daily Traffic 平均日交通量) • AWT (Average Weekday Traffic 平均周日交通量) • Hourly volumes and peak hour volume （小时流 量，高峰小时流量）
Rate of flow(流率)-- defined as an equivalent hourly volume for a given interval (interval can be 5, 10, 15 minutes) Peak hour factor(高峰小时系数) DDHV (Directional Design Hourly Volume i 计小时流量) PCE and Pcu(小汽车当量)
• Rate of flow (流率）--- defined as an equivalent hourly volume for a given interval (interval can be 5, 10, 15 minutes) • Peak hour factor （高峰小时系数） • DDHV (Directional Design Hourly Volume 设 计小时流量) • PCE and PCU （小汽车当量）
此京业学 Table 5.1: Illustration of Daily volume Parameters 2 3 4 6 7 No of Total Total Total AWT ADT Month Weekdays Days in Monthly Weekday 5/2 4/3 In MonthMonth Volume Volume (days) (days) (ehs) vhs (veh/day)I(veh/day) Jan 22 31 425,000 208000 9.455 13.710 Feb 20 28 410.000 220.000 11.000 14.643 Mar 22 31 385.000 185.000 8.409 12419 A 22 30 400.000 200.000 9.091 13333 May 21 31 450.000 215,000 10.238 14,516 J un 22 30 500.000 230.000 10.455 16.667 Jul 23 31 580.000 260.000 11,304 18,710 u 21 31 570.000 260.000 12,381 18.387 Sep 22 30 490,000 205000 9,318 16,333 Oct 22 31 420.000 190.000 8.636 13.548 30 415000 200,000 9.524 13.833 Dec 22 31 400.000 210.000 9,545 12.903 Total2603655,445,0002,583,000 注 AADT=5,445,0001365 14,918 veh/day AAWT=2583,000/260= 9,935 veh/day