Module 1: An Introduction to Transport Engineering Flashcards
Risk
A situation involving exposure to danger. Characterized in terms of the magnitude of adverse consequences and the probability of those consequences occurring.
Perceived vs. Actual Risk
Typically what we perceive to be of greater risk is less in actuality.
Transportation is a ______ Demand
Derived
Transportation System (T)
The physical transportation system (supply) and its properties
Activity System (A)
Totality of social, economic, political, and other transactions taking place over space and time that generates the demand for transportation
Flow System (F)
The magnitude and nature of movements, resources consumed, and services provided
F is determined by
The short term equilibrium of T and A
Changes in F leads to …
long-term changes in A
Current changes in F lead to…
changes in T
Variables S and V
S: The quality of service (a function of T, and V) represented as S = J(T,V) (Holds T constant)
V: The demand for a service (a function of A, and S) represented as V = D(A,S) (Holds A constant)
F is characterized in terms of V and S
What is Induced Demand
as road capacity increases so does consumption
What is Reduced Demand
as road capacity decreases so to may consumption
_____ are created by ______________ and enable road users to respond to common situations in ________ and ________ ways
Expectancies are created by prior experiences and enable road users to respond to common situations in predictable and successful ways
Human Factors of Design
Visual Characteristics
Cognitive Abilities
Perception Reaction Time
Visual Characteristics
FOV
Visual Search Characteristics
Contrast Sensitivity
Perception of closing velocity
