G5-MODAL SPLIT Flashcards
The third stage in travel demand modeling
MODAL SPLIT
modes make use of road space more efficiently than private transport.
PUBLIC TRANSPORT
-Highly flexible
-More comfortable and convenient travel
-Better accessibility
PRIVATE TRANSPORT
FACTORS INFLUENCING THE CHOICE OF MODE
- CHARACTERISTICS OF THE TRIP MAKER
- CHARACTERISTICS OF THE JOURNEY
- CHARACTERISTICS OF THE TRANSPORT FACILITY
-car availability and/or ownership;
-possession of a driving license;
-household structure (young couple, couple with children, retired people etc.);
-income;
-decisions made elsewhere, for example the need to use a car at work, take children to school, etc;
-residential density.
CHARACTERISTICS OF THE TRIP MAKER
-The trip purpose; for example, the journey to work is normally easier to undertake by public transport than other journeys because of its regularity and the adjustment possible in the long run;
-Time of the day when the journey is undertaken.
-Late trips are more difficult to accomAmodate by public transport.
CHARACTERISTICS OF THE JOURNEY
There are two types of factors. One is quantitative and the other is qualitative.
CHARACTERISTICS OF THE TRANSPORT FACILITY
-relative travel time: in-vehicle, waiting and walking times by each mode;
-relative monetary costs (fares, fuel and direct costs);
-availability and cost of parking
QUANTITATIVE FACTORS
-comfort and convenience
reliability and regularity
-protection, security
QUALITATIVE FACTORS
TYPES OF MODAL SPLIT MODELS
-TRIP-END MODAL SPLIT MODEL
-TRIP INTERCHANGE MODAL SPLIT MODEL
-LOGIT MODEL ANALYSIS
-BIINARY LOGIT MODEL
-MULTINOMIAL LOGIT MODEL
Traditionally, the objective of transportation planning was to forecast the growth in demand for car trips so that investment could be planned to meet the demand.
TRIP-END MODAL SPLIT MODEL
This is the post-distribution model that modal split is applied after the distribution stage.
TRIP INTERCHANGE MODAL SPLIT MODEL
model is the simplest form of mode choice, where the travel choice between two modes is made.
BIINARY LOGIT MODEL
Social benefits of public transport
- Less congestion on the road
- Less accidents
- Travel at low cost
- Fuel is used more efficiently
- Having a particular schedule, frequency, etc.
In growth factor models, the are multiplied by growth factors to yield horizon year trip interchange.
BASE YEAR TRIP INTERCHANGES
This method utilized a different growth factor for each zone to predict inter zonal trips
AVERAGE GROWTH FACTOR METHOD
It is one of the most important classic models in transport planning because of the key role played by public transport in policy making.
MODE CHOICE
Mode choice is strongly influenced by two main factors.
- TRIP PURPOSE
- TIME OF THE DAY
characteristics of transport facility
- RELATIVE TRAVEL TIME
- RELATIVE MONETARY COST
- AVAILABILITY AND COST OF PARKING
A process used in transportation planning where traffic volumes are assigned in steps or increments.
INCREMENTAL ASSIGNMENT
It attempts to approximate an equilibrium solution by iterating between all-or-nothing traffic loadings and recalculating link travel times based on a congestion function that reflects link capacity.
CAPACITY RESTRAINT ASSIGNMENT
It is a transportation planning and geographic information system (GIS) software developed by Caliper Corporation.
TRANSCAD
