G5-QUIZZES Flashcards
It involves separating (splitting) the predicted trips from each origin zone to each destination zone into distinct travel modes (e.g., walking, bicycle, driving, train, bus)
Modal Split
Enumerate the Two types of mode choices
Public Transport
Private Transport
This is the fourth step in the conventional transportation forecasting model. In this stage, given sets of trip interchanges are allocated to the specified transportation system (routes).
Traffic Assignment
In this method the trips from any origin zone to any destination zone are loaded onto a single, minimum cost, path between them. This model is unrealistic as only one path between every O-D pair is utilized even if there is another path with the same or nearly same travel cost.
All-or-nothing traffic assignment
It involves separating (splitting) the predicted trips from each origin zone to each destination zone into distinct travel modes (e.g., walking, bicycle, driving, train, bus).
MODAL SPLIT
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
Public transport modes make use of road space more efficiently than private transport.
- LESS CONGESTION ON THE ROAD
- LESS ACCIDENTS
- TRAVEL AT LOW COST
- FUEL IS USED MORE EFFICIENTLY
- HAVING A PARTICULAR SCHEDULE, FREQUENCY, ETC
Mode choice is strongly influenced by two main factors.
- TRIP PURPOSE
- TIME OF THE DAY
This model is traditionally used in transportation planning to forecast car trip demand. It is focused on personal characteristics as determinants of mode choice.
TRIP-END MODAL SPLIT MODELS
This model applied after the distribution stage in transportation planning. It allows for the evaluation of policy impacts on modal choice.
TRIP-INTERCHANGE MODAL SPLIT MODELS
These models are used to estimate the traffic flows on a network
TRAFFIC ASSIGNMENT MODELS
It is the most basic form of trip assignment, which loads all trips for each zone pair to one shortest path.
ALL-OR-NOTHING ASSIGNMENT
It is a concept in transportation planning based on Wardrop’s first principle.
USER EQUILIBRIUM ASSIGNMENT
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
