Nigel H.M. Wilson
1.201, Fall 2006
1
Lecture 12
MACRO DESIGN MODELS
FOR A SINGLE ROUTE
Outline
1.
Introduction to analysis approach
2.
Bus frequency model
3.
Stop/station spacing model

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*
Nigel H.M. Wilson
1.201, Fall 2006
2
Lecture 12
Introduction to Analysis Approach
•
Basic approach is to establish an
aggregate total cost function including:
•
operator cost as
f
(design parameters)
•
user cost as
g
(design parameters)
•
Minimize total cost function to determine
optimal design parameter (s.t. constraints)
Variants include:
•
Maximize service quality s.t. budget constraint
•
Maximize consumer surplus s.t. budget constraint
Total Cost
User Cost
h
OPT
Headway
Operator Cost
Cost

Nigel H.M. Wilson
1.201, Fall 2006
3
Lecture 12
Bus Frequency Model:
the Square Root Model
Problem:
define bus service frequency on a
route as a function of ridership
Total Cost = operator cost + user cost

This
** preview**
has intentionally

**sections.**

*blurred***to view the full version.**

*Sign up*