Notes Flashcards
6 Steps to the Rational Planning Process.
- Defining the problem
- Formulate Goals
- Data (census, maps, networks)
- Generate & Assess Alternatives
- Implementation of Alternatives
- Evaluation
Alternatives The Rational Planning Processes
- Statisficing
- Hierarchical Decomposition
- Organizational Process
- Political Bargaining
- Incrementalism
Satisficing
Whereas the rational planning prcess aims to find the most optimal solution when making a decision, the objective of the satisficing approach is to choose a choice that is good enough and will satisfy a minimum threshold
Hierarchical Decompostion
The optimal solution resulting form the rational planning process may require actions to be taken simultaneously in different areas; this can be very impractical and taunting undertaking/
Organizational Process
This approach refers to how organizationals actually function in the real world, where there are internal process and policies. These processes and policies are inherently bureaucratic and costly to implement but they are in place to ensure that proper actuas are taken.
Political Bargaining
In our political system where decisions are made for communities of people with different values, compromises are needed to weigh those values based on the political strength and imptance of the issues and the decision makers.
Incrementalism
The best or most optimal solution, as idealized in the rational planning process, may involve many significantly large changes to a system. Instead using small incremental changes.
Model vs. Framework
Model - A mathematical representation of a system
Framework - Qualitative organizing principles for analyzing systems
Why do we create models?
- Gain insight
- Simplicity
- Operate the system better
- Learn from modeling
- Negotiating tool
What are some trade offs of models?
▪ Money
▪ Data
▪ Computable power
▪ Labor
▪ Easier to use
▪ More Convincing
▪ Extendable (can it be used again) ▪ Benefits -> provide evidence
▪ Measure model success
What type characteristics do Travel Surveys ask or look at?
- Individual: age, sex, education, employment
- Household: size, members, housing, life style
- Vehicles: numbers, year, make, model, miles
- Trips: diary (24), routine/special, O/D,mode, route, cost,time, stops, purpose
- Attitudes: pre disposition, motivations,travel or non travel specific
Revealed Preference (RP) vs. Stated Preference (SP)
- What are the dis/advantages of rp survey?
- People underreport walking
- $300-400 per person (150-200) cost of labor analysis, transcribing from paper
- What are the dis/advantages of sp survey?
- More people would say they would do if it was available
Layers of Networks
- Space (earth)
- R.O.W. Right of way
- Alignment (horizontal & vertical)
- Structure (pavement, compacted earth, bridges)
- Pavement Surface
- Markings (direct/ guide)
- Signs and signals
- Services (types of vehicles, scheduled, random)
- Driver and passenger and goods
- End to end trips
- Trip ends (origin and destination)
- Places (activities)
Hierarchy of Raods
- Freeways (highways)
- Arterial (Main Street)
- Collectors
- Locals (residential neighborhoods)
Stochastic Queues
random arrival or random departure or both
