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Program Highlights
o Basic principles of traffic signal control and traffic flow theory, and limitations of current practice
o Signal control logic including time budget and delay estimation
o A brief introduction of cell transmission model (CTM) and microsimulation software VISSIM that are capable of capturing dynamic traffic, spatial queuing, and other properties for deriving performance indices, such as delay, queue length, and vehicle throughput.
o DISCO (Dynamic Intersection Signal Control Optimisation) software demonstration for signal control optimization and coordination between multiple junctions
o VISSIM micro-simulation software demonstration
Preliminary Program
DISCO Software demonstration with hands-on example
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Simulation and Visualisation
b. Optimization (Single junction to multiple junctions)
VISSIM software demonstration
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Demonstration of VISSIM inputs and outputs
b. Visualization
Basic principles and limitations of current practice
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
Traffic Signal Control fundamentals
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Time budget, delay vs throughput (long cycle vs short cycle)
b. Delay estimation: D/D/1 formula, Webster
c. Optimisation for minimum delay using D/D/1
Advanced model for traffic control: Cell Transmission Model (CTM)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Signalised Intersection
i. Webster Formula and Reserve Capacity (RC)
b. Roundabout
i. Design Flow to Capacity (DFC)
ii. Lane Flow Diagram (LFD)
a. Spatial queuing and dynamic loading
b. Model computation
c. Performance Indices: delay, queue length, reserve capacity, vehicle throughput