Traffic Control Theory and Methods (交通控制理论和方法) For Master Students in Transport Chongqing Jiaotong University
Traffic Control Theory and Methods (交通控制理论和方法 ) Chongqing Jiaotong University For Master Students in Transport
Chapter 5 Traffic Control at Single Intersection 5.1 Basic concept of traffic signal control 5.2 Parameters in traffic signal control 5.3 Choice of objective Function 5.4 Calculation of Cycle Length 5.5 Calculation of split 5.6 Intelligent Traffic Control at Intersection
Chapter 5 Traffic Control at Single Intersection 5.1 Basic concept of traffic signal control 5.2 Parameters in traffic signal control 5.3 Choice of Objective Function 5.4 Calculation of Cycle Length 5.5 Calculation of Split 5.6 Intelligent Traffic Control at Intersection
e) Chapter 5 Traffic Control at Single Intersection 5.1 Basic concept of traffic signal control Right of way=row Please tell what is the right of way Traffic control to manage r.o.w
Right of way = r.o.w. Please tell what is the right of way? Traffic control = to manage r.o.w. 5.1 Basic concept of traffic signal control Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection 5. 1 Basic concept of traffic signal control Signal phase= time sequence for r.o.w 东西直行 东西路 东西左转弯 南北直行 图11两相位信号的相位图 南北左转弯 图11-4 交通信号控制的8个相位
Signal phase = time sequence for r.o.w. 5.1 Basic concept of traffic signal control Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection 5. 1 Basic concept of traffic signal control Signal stage: part of signal cycle, during which one set of streams has r ow 周期C 第一相位时间- 第二相位时间- 西路 南北路 第二位时间 图112两相位信号配时图 车辆或行人直接通行 行人优先,然后通行 过了停车线的车辆继续通行,未到达停车线的车辆禁止通行 进入人行道的行人快速通过,未进入行人道的禁止通行
Signal stage: part of signal cycle, during which one set of streams has r.o.w. 周期C 第一相位时间 第二相位时间 时间 车辆或行人直接通行 让行人优先，然后通行 禁止通行 过了停车线的车辆继续通行，未到达停车线的车辆禁止通行 进入人行道的行人快速通过，未进入行人道的禁止通行 44 34 24 14 41 42 43 31 32 33 21 22 23 11 12 13 1 t 2 t 4 t 3 t 5 t 6 t 信 号 灯 5.1 Basic concept of traffic signal control Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection 5.2 Parameters in traffic signal control Cycle 路口最大通行能力 Cycle length 饱和流量 ost time Effective lost time 前损失时 损失时间 有效绿灯时间 red clearance or all-red walk interval, WALK. 时间 flashing don t walk, FDw pedestrian phase time
5.2 Parameters in traffic signal control Cycle Cycle length Lost time Effective lost time Split red clearance or all-red walk interval，WALK, flashing don’t walk，FDW pedestrian phase time 有效绿灯时间 时间 路口最大通行能力 前损失时间 后损失时间 饱和流量 Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection Delay Cumulative intersection delay ehicles (i) N declive =sape=v control delay uniform delay initial queue delay Debito Arriving random delay le≠ SSpe= aggregate delay chegad as Debito- pedestrian delay de anting partidas Capacity tG Number of stops Queue length saturation degree
Delay intersection delay control delay uniform delay initial queue delay random delay aggregate delay pedestrian delay Capacity Number of stops Queue length saturation degree declive = s declive = q Débito de chegadas Débito de partidas N t Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection Calculation of Cycle Length Cycle length could be calculated by 1- L is the lose time obtained by L=∑(:+1-A)2 Y is obtained by =∑ maxy,y=∑max)()
Calculation of Cycle Length Cycle length could be calculated by L is the lose time obtained by Y is obtained by Chapter 5 Traffic Control at Single Intersection
e) Chapter 5 Traffic Control at Single Intersection Choice of Objective Function D=D1+D2+.+Dm Di could be delays, stop, queue length,…
Choice of Objective Function Chapter 5 Traffic Control at Single Intersection D=D1+D2+…..+Dm Di could be delays, stop, queue length, …
e) Chapter 5 Traffic Control at Single Intersection Calculation of Split p could be obtained by optimiz D
Calculation of Split 0 * 1 D D D1 2 D1-2 Chapter 5 Traffic Control at Single Intersection * could be obtained by optimiz D