Transport Planning and Design Manual Vol 4
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Time
Phase A
Phase B
Early cut-off
Phase C
Phase E
Early early-off
CASE 1
Saturation flow
Volume
Flow rati
Traffic Flow Theory:
Shockwave
Hong K LO
Civil Engineering
HKUST
1
2
Shockwave Analysis
A shock wave is said to exist whenever traffic
streams of varying stream conditions meet.
Flow-speed-density s
Optimization Approach
In the idealized situation where traffic arrives uniformly and deterministically to a
signalized intersection, one can model the traffic control system as a D/D/1 queuing
regime.
CIVL 563 Traffic Control Fundamentals
Homework 2
Due Date: April 21, 2010
1.
The timing plan of an approach (with 1-lane) to an intersection is as follows:
Effective red: 30 seconds
Effective green: 3
CIVL 563 Traffic Control Fundamentals
Homework 1
Due Date: March 17, 2010
ANSWER ALL FIVE QUESTIONS
1. An intersection approach has three lanes, permitted right turns, 8% right turns
with a through ve
1
Dynamic Intersection Signal Control
Optimization (DISCO)
Hong K LO
Civil Engineering
Hong Kong University of Science and Technology
Traffic Control Basics
Traffic Flow
: Queue
Traffic Flow
Traffic F
Continuum Kinematics Model (I)
Hong K LO
Civil Engineering
HKUST
1
Conservation
2
3
k q
+
=0
t x
In general, we assume that the relationship between flow
and density varies only with x, but not t. Som
Traffic Flow Theory:
Microscopic Car following Models
Hong K LO
Civil Engineering
HKUST
1
Microscopic Density Characteristics
Concerns with the longitudinal space occupied by
individual vehicles in t
Basic Principles of Intersection
Signalization
Hong K LO
Civil Engineering
HKUST
1
Types of Intersections
Intersection at
grade
Grade separation
without ramps
Interchanges: rely
on geometry to
avoi